V tejto téme budeme diskutovať o tom, ako napíšeme program kalkulačky v programovacom jazyku C. Kalkulačka je malé elektronické zariadenie používané na vykonávanie rôznych aritmetických operácií, ako je sčítanie, odčítanie, násobenie, delenie, percento atď. Uľahčuje a zrýchľuje naše výpočty. Ide o prenosné zariadenie, ktoré možno použiť kdekoľvek na vykonávanie jednoduchých matematických operácií. V niektorých situáciách používame vedeckú alebo sofistikovanú kalkulačku, keď potrebujeme riešiť zložité výpočty, ako sú trigonometrické funkcie, exponenciálne operátory, stupne, radiány, log funkcie, hyperbolické funkcie atď. Poďme diskutovať o rôznych spôsoboch vytvorenia programu kalkulačky v jazyku C .
Algoritmus programu Kalkulačka
Krok 1: Deklarujte lokálne premenné n1, n2, res, opt. Napríklad, ak n1 a n2 majú dve číselné hodnoty, res uloží výsledky a premenná opt definuje symboly operátora.
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Krok 2: Vytlačte výber (sčítanie, odčítanie, násobenie, delenie atď.
Krok 3: Zadajte Voľbu
Krok 4: Má dve čísla, n1 a n2
Krok 5: Skok prípadu prepnutia na operátora zvoleného používateľom
Krok 6: Uložiť výsledok do premennej res.
Krok 7: Zobrazte výsledok operácie
Krok 8: Ukončite program.
Rôzne spôsoby vytvorenia programu kalkulačky v C
Nasledujú rôzne spôsoby, ako napísať program kalkulačky v jazyku C.
- Kalkulačka Program v C pomocou príkazu switch
- Kalkulačka Program v C pomocou príkazu if else if
- Kalkulačka Program v C využívajúci slučku do-while a príkaz switch
- Kalkulačka Program v C pomocou funkcie a príkazu switch
Príklad 1: Program kalkulačky v jazyku C s použitím príkazu switch
Napíšme program na vytvorenie programu Kalkulačka pomocou príkazu 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; } Výkon:
Príklad 2: Program kalkulačky v jazyku C s použitím príkazu if else if
Zoberme si príklad na napísanie jednoduchého programu Kalkulačka v C pomocou príkazu if else if.
Sridevi
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; } Výkon:
Príklad 3: Program kalkulačky v jazyku C používajúci slučku do while a príkaz switch
Vytvorme program Kalkulačka pomocou slučky do while a príkazu switch case v C
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; } Výkon:
Príklad 4: Program kalkulačky v jazyku C s použitím príkazu funkcie a prepínača
Vytvorme program Kalkulačka pomocou príkazu funkcie a prepínača prípadu v 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></=>