V tej temi bomo razpravljali o tem, kako napišemo kalkulatorski program v programskem jeziku C. Kalkulator je majhna elektronska naprava, ki se uporablja za izvajanje različnih aritmetičnih operacij, kot so seštevanje, odštevanje, množenje, deljenje, odstotki itd. Omogoča lažje in hitrejše izračune. Je prenosna naprava, ki jo lahko uporabljate kjer koli za izvajanje preprostih matematičnih operacij. V nekaterih situacijah uporabljamo znanstveni ali sofisticirani kalkulator, kjer moramo rešiti zapletene izračune, kot so trigonometrične funkcije, eksponentni operatorji, stopinje, radiani, funkcije logaritma, hiperbolične funkcije itd. Razpravljajmo o različnih načinih za ustvarjanje programa za računanje v jeziku C .
Algoritem programa Kalkulator
Korak 1: Deklarirajte lokalne spremenljivke n1, n2, res, opt. Na primer, če imata n1 in n2 dve številski vrednosti, bo res shranil rezultate, spremenljivka opt pa bo definirala simbole operatorjev.
2. korak: Natisnite izbiro (seštevanje, odštevanje, množenje, deljenje itd.).
3. korak: Vnesite izbiro
4. korak: Vzame dve števili, n1 in n2
5. korak: Preklop velikih in malih črk na operaterja, ki ga izbere uporabnik
6. korak: Shrani rezultat v spremenljivko res.
7. korak: Prikažite rezultat operacije
8. korak: Izhod iz programa.
Različni načini za ustvarjanje programa kalkulator v C
Sledijo različni načini pisanja kalkulatorskega programa v jeziku C.
- Program kalkulatorja v C z uporabo stavka switch
- Program kalkulator v C z uporabo if else if stavka
- Program kalkulatorja v C z uporabo zanke do-while in stavka switch
- Program kalkulatorja v C z uporabo funkcije in stavka switch
Primer 1: Program kalkulatorja v C z uporabo stavka switch
Napišimo program za ustvarjanje programa kalkulator z uporabo stavka switch
program.c
#include int main() { // declare local variables char opt; int n1, n2; float res; printf (' Choose an operator(+, -, *, /) to perform the operation in C Calculator
'); scanf ('%c', &opt); // take an operator if (opt == '/' ) { printf (' You have selected: Division'); } else if (opt == '*') { printf (' You have selected: Multiplication'); } else if (opt == '-') { printf (' You have selected: Subtraction'); } else if (opt == '+') { printf (' You have selected: Addition'); } printf ('
Enter the first number: '); scanf(' %d', &n1); // take fist number printf (' Enter the second number: '); scanf (' %d', &n2); // take second number switch(opt) { case '+': res = n1 + n2; // add two numbers printf (' Addition of %d and %d is: %.2f', n1, n2, res); break; case '-': res = n1 - n2; // subtract two numbers printf (' Subtraction of %d and %d is: %.2f', n1, n2, res); break; case '*': res = n1 * n2; // multiply two numbers printf (' Multiplication of %d and %d is: %.2f', n1, n2, res); break; case '/': if (n2 == 0) // if n2 == 0, take another number { printf ('
Divisor cannot be zero. Please enter another value '); scanf ('%d', &n2); } res = n1 / n2; // divide two numbers printf (' Division of %d and %d is: %.2f', n1, n2, res); break; default: /* use default to print default message if any condition is not satisfied */ printf (' Something is wrong!! Please check the options '); } return 0; } Izhod:
Primer 2: Program kalkulator v C z uporabo if else if stavka
Oglejmo si primer pisanja preprostega programa Kalkulator v C z uporabo if else if stavka.
program2.c
#include int main() { // declare local variables char opt; int n1, n2; float res; printf (' Select an operator (+, -, *, /) to perform an operation in C calculator
'); scanf ('%c', &opt); // take an operator printf (' Enter the first number: '); scanf(' %d', &n1); // take fist number printf (' Enter the second number: '); scanf (' %d', &n2); // take second number if (opt == '+') { res = n1 + n2; // add two numbers printf (' Addition of %d and %d is: %f', n1, n2, res); } else if (opt == '-') { res = n1 - n2; // subtract two numbers printf (' Subtraction of %d and %d is: %f', n1, n2, res); } else if (opt == '*') { res = n1 * n2; // multiply two numbers printf (' Multiplication of %d and %d is: %f', n1, n2, res); } else if (opt == '/') { if (n2 == 0) // if n2 == 0, take another number { printf ('
Divisor cannot be zero. Please enter another value '); scanf ('%d', &n2); } res = n1 / n2; // divide two numbers printf (' Division of %d and %d is: %.2f', n1, n2, res); } else { printf('
You have entered wrong inputs '); } return 0; } Izhod:
Primer 3: Program kalkulatorja v C z uporabo zanke do while in stavka switch
Ustvarimo program Kalkulator z uporabo zanke do while in stavka switch case v C
java znak v int
program3.c
#include #include #include int main() { // declaration of local variable op; int op, n1, n2; float res; char ch; do { // displays the multiple operations of the C Calculator printf (' Select an operation to perform the calculation in C Calculator: '); printf ('
1 Addition 2 Subtraction
3 Multiplication 4 Division
5 Square 6 Square Root
7 Exit
Please, Make a choice '); scanf ('%d', &op); // accepts a numeric input to choose the operation // use switch statement to call an operation switch (op) { case 1: // Add two numbers printf (' You chose: Addition'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); res = n1 + n2; // Add two numbers printf (' Addition of two numbers is: %.2f', res); break; // break the function case 2: // Subtract two numbers printf (' You chose: Subtraction'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); res = n1 - n2; // subtract two numbers printf (' Subtraction of two numbers is: %.2f', res); break; // break the function case 3: // Multiplication of the numbers printf (' You chose: Multiplication'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); res = n1 * n2; // multiply two numbers printf (' Multiplication of two numbers is: %.2f', res); break; // break the function case 4: // Division of the numbers printf (' You chose: Division'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); if (n2 == 0) { printf ('
Divisor cannot be zero. Please enter another value '); scanf ('%d', &n2); } res = n1 / n2; // divide two numbers printf (' Division of two numbers is: %.2f', res); break; // break the function case 5: // getting square of a number printf (' You chose: Square'); printf ('
Enter First Number: '); scanf (' %d', &n1); res = n1 * n1; // get square of a number printf (' Square of %d number is: %.2f', n1, res); break; // break the function case 6: // getting the square root of the number printf (' You chose: Square Root'); printf ('
Enter First Number: '); scanf (' %d', &n1); res = sqrt(n1); // use sqrt() function to find the Square Root printf (' Square Root of %d numbers is: %.2f', n1, res); break; // break the function case 7: printf (' You chose: Exit'); exit(0); break; // break the function default: printf(' Something is wrong!! '); break; } printf ('
**********************************************
'); } while (op != 7); return 0; } Izhod:
Primer 4: Program kalkulatorja v C z uporabo funkcije in stavka switch
Ustvarimo program Kalkulator z uporabo funkcije in stavka za zamenjavo velikih in malih črk v jeziku C
program4.c
#include #include #include #include // function declarations int addition(); int subtract(); int multiply(); int divide(); int sq(); int sqrt1(); void exit(); int main() { // declaration a local variable op; int op; do { // displays the multiple operations of the C Calculator printf (' Select an operation to perform the calculation in C Calculator: '); printf ('
1 Addition 2 Subtraction
3 Multiplication 4 Division
5 Square 6 Square Root
7 Exit
Please, Make a choice '); scanf ('%d', &op); // accepts a numeric input to choose the operation // use switch statement to call an operation switch (op) { case 1: addition(); /* It call the addition() function to add the given numbers */ break; // break the function case 2: subtract(); /* It call the subtract() function to subtract the given numbers */ break; // break the function case 3: multiply(); /* It call the multiply() function to multiply the given numbers */ break; // break the function case 4: divide(); // It call the divide() function to divide the given numbers break; // break the function case 5: sq(); // It call the sq() function to get the square of given numbers break; // break the function case 6: sqrt1(); /* It call the sqrt1() function to get the square root of given numbers */ break; // break the function case 7: exit(0); // It call the exit() function to exit from the program break; // break the function default: printf(' Something is wrong!! '); break; } printf ('
**********************************************
'); } while (op != 7); return 0; } // function definition int addition() { int i, sum = 0, num, f_num; // declare a local variable printf (' How many numbers you want to add: '); scanf ('%d', &num); printf (' Enter the numbers:
'); for (i = 1; i <= num; i++) { scanf(' %d', &f_num); sum="sum" + f_num; } printf (' total of the numbers="%d'," sum); return 0; use subtract() function to subtract two int n1, n2, res; first number is: '); scanf &n1); second &n2); res="n1" - n2; subtraction %d res); multiply() multiply * divide() divide if (n2="=" 0)
divisor cannot be zero. please enter another value ('%d', division sq() get square given a square: n1; sqrt1() root float root: %f', < pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/c-tutorial/61/calculator-program-c-5.webp" alt="Calculator Program in C"> <hr></=>