U ovoj temi raspravljat ćemo o tome kako napisati program kalkulatora u programskom jeziku C. Kalkulator je mali elektronički uređaj koji se koristi za izvođenje raznih aritmetičkih operacija poput zbrajanja, oduzimanja, množenja, dijeljenja, postotaka itd. Čini naše izračune lakšim i bržim. To je prijenosni uređaj koji se može koristiti bilo gdje za izvođenje jednostavnih matematičkih operacija. Koristimo znanstveni ili sofisticirani kalkulator u nekim situacijama, kada trebamo riješiti složene izračune kao što su trigonometrijske funkcije, eksponencijalni operatori, stupnjevi, radijani, logaritamske funkcije, hiperboličke funkcije itd. Raspravljajmo o različitim načinima stvaranja programa kalkulatora u C jeziku .
Algoritam programa kalkulatora
Korak 1: Deklarirajte lokalne varijable n1, n2, res, opt. Na primjer, gdje n1 i n2 imaju dvije numeričke vrijednosti, res će pohraniti rezultate, a opt varijabla definirati simbole operatora.
Korak 2: Ispiši izbor (zbrajanje, oduzimanje, množenje, dijeljenje itd.
Korak 3: Unesite izbor
Korak 4: Uzima dva broja, n1 i n2
Korak 5: Prebacivanje velikih i malih slova na operatora kojeg je odabrao korisnik
Korak 6: Pohrani rezultat u res varijablu.
Korak 7: Prikaz rezultata operacije
Korak 8: Izlaz iz programa.
Različiti načini za izradu programa kalkulatora u C-u
Slijede različiti načini pisanja programa kalkulatora u jeziku C.
- Program kalkulatora u C-u pomoću naredbe switch
- Program kalkulatora u C-u koji koristi if else if naredbu
- Program kalkulatora u C-u koristeći do-while petlju i naredbu switch
- Program kalkulatora u C-u koji koristi funkciju i naredbu switch
Primjer 1: Program kalkulatora u C-u pomoću naredbe switch
Napišimo program za stvaranje programa kalkulatora pomoću naredbe 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; } Izlaz:
pvr puni oblik
Primjer 2: Program kalkulatora u C-u koji koristi if else if naredbu
Razmotrimo primjer pisanja jednostavnog programa kalkulatora u C-u koristeći if else if naredbu.
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; } Izlaz:
Primjer 3: Program kalkulatora u C-u koji koristi do while petlju i naredbu switch
Kreirajmo program Kalkulator koristeći do while petlju i naredbu switch case u C-u
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; } Izlaz:
Primjer 4: Program kalkulatora u C-u koji koristi funkciju i naredbu switch
Kreirajmo program kalkulatora pomoću naredbe funkcije i promjene slučaja u C-u
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></=>