OBRNITE NIZ V C

V tej temi bomo razpravljali o več načinih obračanja niza v programskem jeziku C. Obračanje niza je tehnika, ki obrne ali spremeni vrstni red danega niza, tako da zadnji znak niza postane prvi znak niza in tako naprej. Poleg tega lahko preverimo tudi palindrom danega niza tako, da obrnemo prvotni niz.

Na primer, vnesemo niz ' JABOLKO ', nato pa uporabite obratni algoritem. Obratni algoritem vrne niz ' ELPPA ', ki je popolnoma obrnjen od izvirnega niza.

Različni načini za iskanje hrbtne strani niza v C

Sledijo različni načini iskanja obrnjene strani niza v programskem jeziku C:

Obrnite niz s funkcijo strrev().
Obrnite niz brez uporabe knjižnične funkcije
Obrnite niz s funkcijo rekurzije
Obrnite niz z uporabo zanke for
Obrnite niz z uporabo zanke while
Obrnite niz z uporabo kazalcev
Obrnite niz, da preverite palindrom

Program 1: Natisnite hrbtno stran niza s funkcijo strrev().

Oglejmo si primer tiskanja hrbtne strani niza s funkcijo strrev().

Program1.c

zamenjava pomnilnika

 #include #include int main() { char str[40]; // declare the size of character string printf (&apos; 
 Enter a string to be reversed: &apos;); scanf (&apos;%s&apos;, str); // use strrev() function to reverse a string printf (&apos; 
 After the reverse of a string: %s &apos;, strrev(str)); return 0; }

Izhod

 Enter a string to be reversed: AMBULANCE After the reverse of a string: ECNALUBMA

Program 2: Tiskanje hrbtne strani niza brez uporabe knjižnične funkcije

Oglejmo si primer tiskanja hrbtne strani niza z uporabo uporabniško določene funkcije.

Program2.c

 #include #include // function definition of the revstr() void revstr(char *str1) { // declare variable int i, len, temp; len = strlen(str1); // use strlen() to get the length of str string // use for loop to iterate the string for (i = 0; i <len 2; i++) { temp variable use to temporary hold the string str1[i]="str1[len" - i 1]; str1[len 1]="temp;" } int main() char str[50]; size of printf (' enter string: '); gets(str); gets() function take 
 before reversing %s 
', str); call revstr() revstr(str); after %s', < pre> <p> <strong>Output</strong> </p> <pre> Enter the string: Welcome Friends Before reversing the string: Welcome Friends After reversing the string: sdneirF emocleW </pre> <h3>Program 3: Print the reverse of a string using the recursion function</h3> <p>Let&apos;s consider an example to print the reverse of a string using the recursion function.</p> <p> <strong>Recursion function:</strong> A recursion function is a function that continuously calls the same function without using a looping statement.</p> <p> <strong>Program3.c</strong> </p> <pre> #include #include // use recursion function void revstr(char *str1) { // declare static variable static int i, len, temp; len = strlen(str1); // use strlen() to get the length of str string if (i <len 2){ temp variable use to temporary hold the string str1[i]="str1[len" - i 1]; str1[len 1]="temp;" i++; revstr(str1); recusively calls revstr() function } int main() { char str1[50]; size of printf (' enter string: '); gets(str1); gets() take 
 before reversing %s 
', str1); call after %s', < pre> <p> <strong>Output</strong> </p> <pre> Enter the string: LIFE INSURANCE Before reversing the string: LIFE INSURANCE After reversing the string: ECNARUSNI EFIL </pre> <h3>Program 4: Print the reverse of a string using for loop</h3> <p>Let&apos;s consider an example to print the reverse of a string using for loop in C programming language.</p> <p> <strong>Program4.c</strong> </p> <pre> #include #include #include void main() { char str[50], temp; // define the size of str[] array int i, left, right, len; printf (&apos; 
 Display a reverse string in the C: 
&apos;); printf (&apos; ----------------------- &apos;); printf (&apos; 
 Enter a string to reverse order: &apos;); scanf( &apos;%s&apos;, &amp;str); len = strlen(str); // get the length of the string left = 0; // set left index at 0 right = len - 1; // set right index len - 1 // use for loop to store the reverse string for (i = left; i <right; i++) { temp="str[i];" str[i]="str[right];" str[right]="temp;" right--; } printf (' the reverse of original string is: %s ', str); getch(); < pre> <p> <strong>Output</strong> </p> <pre> Display a reverse string in the C: ----------------------- Enter a string to reverse order: APPLE The reverse of the original string is: ELPPA </pre> <h3>Program 5: Print the reverse of a string using while loop</h3> <p>Let&apos;s consider an example to print the reverse of a string using while loop in C programming language.</p> <p> <strong>Program5.c</strong> </p> <pre> #include #include int main() { char str1[50], temp; // declare and initialize the size of string array. int i = 0, j =0; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, str1); j = strlen (str1) - 1; // get the length of the string // use while loop to define the condition while ( i <j) 1 { use temp variable to store the characters of str1 str1[j]="str1[i];" str1[i]="temp;" i++; i incremented by j--; j is decremented } printf (' reversed string: %s', str1); return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reversed of the string: TNIOPTAVAJ </pre> <h3>Program 6: Print the reverse of a string using pointers</h3> <p>Let&apos;s consider an example to print the reverse of a string using pointers in the C programming language.</p> <p> <strong>Program6.c</strong> </p> <pre> #include #include int str_len( char *st); void revstr( char *st); int main() { char st[50]; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, st); revstr(st); printf (&apos; The reverse string is: %s&apos;, st); return 0; } void revstr (char *st) { int len, i; char *start, *end, temp; len = str_len (st); start = st; end = st; for (i = 0; i <len - 1; i++) end++; for (i="0;" i < len 2; { temp="*end;" *end="*start;" *start="temp;" start++; end--; } int str_len (char *ptr) while ( *(ptr + i) !="" ) i++; return i; pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reverse string is: TNIOPTAVAJ </pre> <h3>Program 7: Program to check whether the reverse string is a Palindrome</h3> <p>Consider a program to check whether the given string is a palindrome or not in the C programming language.</p> <p> <strong>Program7.c</strong> </p> <pre> #include #include int main () { // declare variables char str1[30]; int i, len, flag = 0; printf (&apos; Enter a string: &apos;); scanf (&apos;%s&apos;, str1); len = strlen( str1 ); // get the string length for ( i = 0; i <len; i++) { str1[i] is not equal to str1[len-i-1] if (str1[i] !="str1[len" - i 1]) flag="1;" break; exit from statement } (flag) printf (' %s a palindrome string', str1); else palindrome', return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string: madam madam is a palindrome string. </pre> <hr></len;></pre></len></pre></j)></pre></right;></pre></len></pre></len>

Program 3: Natisnite hrbtno stran niza s funkcijo rekurzije

Oglejmo si primer tiskanja hrbtne strani niza s funkcijo rekurzije.

Rekurzijska funkcija: Rekurzijska funkcija je funkcija, ki nenehno kliče isto funkcijo brez uporabe stavka o zanki.

niz bajtov v niz

Program3.c

 #include #include // use recursion function void revstr(char *str1) { // declare static variable static int i, len, temp; len = strlen(str1); // use strlen() to get the length of str string if (i <len 2){ temp variable use to temporary hold the string str1[i]="str1[len" - i 1]; str1[len 1]="temp;" i++; revstr(str1); recusively calls revstr() function } int main() { char str1[50]; size of printf (\' enter string: \'); gets(str1); gets() take 
 before reversing %s 
\', str1); call after %s\', < pre> <p> <strong>Output</strong> </p> <pre> Enter the string: LIFE INSURANCE Before reversing the string: LIFE INSURANCE After reversing the string: ECNARUSNI EFIL </pre> <h3>Program 4: Print the reverse of a string using for loop</h3> <p>Let&apos;s consider an example to print the reverse of a string using for loop in C programming language.</p> <p> <strong>Program4.c</strong> </p> <pre> #include #include #include void main() { char str[50], temp; // define the size of str[] array int i, left, right, len; printf (&apos; 
 Display a reverse string in the C: 
&apos;); printf (&apos; ----------------------- &apos;); printf (&apos; 
 Enter a string to reverse order: &apos;); scanf( &apos;%s&apos;, &amp;str); len = strlen(str); // get the length of the string left = 0; // set left index at 0 right = len - 1; // set right index len - 1 // use for loop to store the reverse string for (i = left; i <right; i++) { temp="str[i];" str[i]="str[right];" str[right]="temp;" right--; } printf (\' the reverse of original string is: %s \', str); getch(); < pre> <p> <strong>Output</strong> </p> <pre> Display a reverse string in the C: ----------------------- Enter a string to reverse order: APPLE The reverse of the original string is: ELPPA </pre> <h3>Program 5: Print the reverse of a string using while loop</h3> <p>Let&apos;s consider an example to print the reverse of a string using while loop in C programming language.</p> <p> <strong>Program5.c</strong> </p> <pre> #include #include int main() { char str1[50], temp; // declare and initialize the size of string array. int i = 0, j =0; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, str1); j = strlen (str1) - 1; // get the length of the string // use while loop to define the condition while ( i <j) 1 { use temp variable to store the characters of str1 str1[j]="str1[i];" str1[i]="temp;" i++; i incremented by j--; j is decremented } printf (\' reversed string: %s\', str1); return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reversed of the string: TNIOPTAVAJ </pre> <h3>Program 6: Print the reverse of a string using pointers</h3> <p>Let&apos;s consider an example to print the reverse of a string using pointers in the C programming language.</p> <p> <strong>Program6.c</strong> </p> <pre> #include #include int str_len( char *st); void revstr( char *st); int main() { char st[50]; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, st); revstr(st); printf (&apos; The reverse string is: %s&apos;, st); return 0; } void revstr (char *st) { int len, i; char *start, *end, temp; len = str_len (st); start = st; end = st; for (i = 0; i <len - 1; i++) end++; for (i="0;" i < len 2; { temp="*end;" *end="*start;" *start="temp;" start++; end--; } int str_len (char *ptr) while ( *(ptr + i) !="" ) i++; return i; pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reverse string is: TNIOPTAVAJ </pre> <h3>Program 7: Program to check whether the reverse string is a Palindrome</h3> <p>Consider a program to check whether the given string is a palindrome or not in the C programming language.</p> <p> <strong>Program7.c</strong> </p> <pre> #include #include int main () { // declare variables char str1[30]; int i, len, flag = 0; printf (&apos; Enter a string: &apos;); scanf (&apos;%s&apos;, str1); len = strlen( str1 ); // get the string length for ( i = 0; i <len; i++) { str1[i] is not equal to str1[len-i-1] if (str1[i] !="str1[len" - i 1]) flag="1;" break; exit from statement } (flag) printf (\' %s a palindrome string\', str1); else palindrome\', return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string: madam madam is a palindrome string. </pre> <hr></len;></pre></len></pre></j)></pre></right;></pre></len>

Program 4: Natisnite hrbtno stran niza z uporabo zanke for

Oglejmo si primer tiskanja hrbtne strani niza z uporabo zanke for v programskem jeziku C.

Program4.c

 #include #include #include void main() { char str[50], temp; // define the size of str[] array int i, left, right, len; printf (&apos; 
 Display a reverse string in the C: 
&apos;); printf (&apos; ----------------------- &apos;); printf (&apos; 
 Enter a string to reverse order: &apos;); scanf( &apos;%s&apos;, &amp;str); len = strlen(str); // get the length of the string left = 0; // set left index at 0 right = len - 1; // set right index len - 1 // use for loop to store the reverse string for (i = left; i <right; i++) { temp="str[i];" str[i]="str[right];" str[right]="temp;" right--; } printf (\' the reverse of original string is: %s \', str); getch(); < pre> <p> <strong>Output</strong> </p> <pre> Display a reverse string in the C: ----------------------- Enter a string to reverse order: APPLE The reverse of the original string is: ELPPA </pre> <h3>Program 5: Print the reverse of a string using while loop</h3> <p>Let&apos;s consider an example to print the reverse of a string using while loop in C programming language.</p> <p> <strong>Program5.c</strong> </p> <pre> #include #include int main() { char str1[50], temp; // declare and initialize the size of string array. int i = 0, j =0; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, str1); j = strlen (str1) - 1; // get the length of the string // use while loop to define the condition while ( i <j) 1 { use temp variable to store the characters of str1 str1[j]="str1[i];" str1[i]="temp;" i++; i incremented by j--; j is decremented } printf (\' reversed string: %s\', str1); return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reversed of the string: TNIOPTAVAJ </pre> <h3>Program 6: Print the reverse of a string using pointers</h3> <p>Let&apos;s consider an example to print the reverse of a string using pointers in the C programming language.</p> <p> <strong>Program6.c</strong> </p> <pre> #include #include int str_len( char *st); void revstr( char *st); int main() { char st[50]; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, st); revstr(st); printf (&apos; The reverse string is: %s&apos;, st); return 0; } void revstr (char *st) { int len, i; char *start, *end, temp; len = str_len (st); start = st; end = st; for (i = 0; i <len - 1; i++) end++; for (i="0;" i < len 2; { temp="*end;" *end="*start;" *start="temp;" start++; end--; } int str_len (char *ptr) while ( *(ptr + i) !="" ) i++; return i; pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reverse string is: TNIOPTAVAJ </pre> <h3>Program 7: Program to check whether the reverse string is a Palindrome</h3> <p>Consider a program to check whether the given string is a palindrome or not in the C programming language.</p> <p> <strong>Program7.c</strong> </p> <pre> #include #include int main () { // declare variables char str1[30]; int i, len, flag = 0; printf (&apos; Enter a string: &apos;); scanf (&apos;%s&apos;, str1); len = strlen( str1 ); // get the string length for ( i = 0; i <len; i++) { str1[i] is not equal to str1[len-i-1] if (str1[i] !="str1[len" - i 1]) flag="1;" break; exit from statement } (flag) printf (\' %s a palindrome string\', str1); else palindrome\', return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string: madam madam is a palindrome string. </pre> <hr></len;></pre></len></pre></j)></pre></right;>

Program 5: Natisnite hrbtno stran niza z uporabo zanke while

Oglejmo si primer tiskanja hrbtne strani niza z uporabo zanke while v programskem jeziku C.

niz v znak java

Program5.c

 #include #include int main() { char str1[50], temp; // declare and initialize the size of string array. int i = 0, j =0; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, str1); j = strlen (str1) - 1; // get the length of the string // use while loop to define the condition while ( i <j) 1 { use temp variable to store the characters of str1 str1[j]="str1[i];" str1[i]="temp;" i++; i incremented by j--; j is decremented } printf (\' reversed string: %s\', str1); return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reversed of the string: TNIOPTAVAJ </pre> <h3>Program 6: Print the reverse of a string using pointers</h3> <p>Let&apos;s consider an example to print the reverse of a string using pointers in the C programming language.</p> <p> <strong>Program6.c</strong> </p> <pre> #include #include int str_len( char *st); void revstr( char *st); int main() { char st[50]; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, st); revstr(st); printf (&apos; The reverse string is: %s&apos;, st); return 0; } void revstr (char *st) { int len, i; char *start, *end, temp; len = str_len (st); start = st; end = st; for (i = 0; i <len - 1; i++) end++; for (i="0;" i < len 2; { temp="*end;" *end="*start;" *start="temp;" start++; end--; } int str_len (char *ptr) while ( *(ptr + i) !="" ) i++; return i; pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reverse string is: TNIOPTAVAJ </pre> <h3>Program 7: Program to check whether the reverse string is a Palindrome</h3> <p>Consider a program to check whether the given string is a palindrome or not in the C programming language.</p> <p> <strong>Program7.c</strong> </p> <pre> #include #include int main () { // declare variables char str1[30]; int i, len, flag = 0; printf (&apos; Enter a string: &apos;); scanf (&apos;%s&apos;, str1); len = strlen( str1 ); // get the string length for ( i = 0; i <len; i++) { str1[i] is not equal to str1[len-i-1] if (str1[i] !="str1[len" - i 1]) flag="1;" break; exit from statement } (flag) printf (\' %s a palindrome string\', str1); else palindrome\', return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string: madam madam is a palindrome string. </pre> <hr></len;></pre></len></pre></j)>

Program 6: Tiskanje hrbtne strani niza s kazalci

Oglejmo si primer tiskanja hrbtne strani niza z uporabo kazalcev v programskem jeziku C.

Program6.c

 #include #include int str_len( char *st); void revstr( char *st); int main() { char st[50]; printf (&apos; Enter a string to be reversed: &apos;); scanf( &apos;%s&apos;, st); revstr(st); printf (&apos; The reverse string is: %s&apos;, st); return 0; } void revstr (char *st) { int len, i; char *start, *end, temp; len = str_len (st); start = st; end = st; for (i = 0; i <len - 1; i++) end++; for (i="0;" i < len 2; { temp="*end;" *end="*start;" *start="temp;" start++; end--; } int str_len (char *ptr) while ( *(ptr + i) !="" ) i++; return i; pre> <p> <strong>Output</strong> </p> <pre> Enter a string to be reversed: JAVATPOINT The reverse string is: TNIOPTAVAJ </pre> <h3>Program 7: Program to check whether the reverse string is a Palindrome</h3> <p>Consider a program to check whether the given string is a palindrome or not in the C programming language.</p> <p> <strong>Program7.c</strong> </p> <pre> #include #include int main () { // declare variables char str1[30]; int i, len, flag = 0; printf (&apos; Enter a string: &apos;); scanf (&apos;%s&apos;, str1); len = strlen( str1 ); // get the string length for ( i = 0; i <len; i++) { str1[i] is not equal to str1[len-i-1] if (str1[i] !="str1[len" - i 1]) flag="1;" break; exit from statement } (flag) printf (\' %s a palindrome string\', str1); else palindrome\', return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string: madam madam is a palindrome string. </pre> <hr></len;></pre></len>

Program 7: Program za preverjanje, ali je povratni niz palindrom

Razmislite o programu za preverjanje, ali je podani niz palindrom ali ne v programskem jeziku C.

Program7.c

 #include #include int main () { // declare variables char str1[30]; int i, len, flag = 0; printf (&apos; Enter a string: &apos;); scanf (&apos;%s&apos;, str1); len = strlen( str1 ); // get the string length for ( i = 0; i <len; i++) { str1[i] is not equal to str1[len-i-1] if (str1[i] !="str1[len" - i 1]) flag="1;" break; exit from statement } (flag) printf (\\' %s a palindrome string\\', str1); else palindrome\\', return 0; < pre> <p> <strong>Output</strong> </p> <pre> Enter a string: madam madam is a palindrome string. </pre> <hr></len;>

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