Q5 Write a program to implement a calculator to perform all the four basic arithmetic operations on integers?

Answer 1

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

int sum(int, int);

int sub(int, int);

int mul(int, int);

int div1(int, int);

int main() {

int a,b,d;

int ch;

printf("\t\tCalculator Implementation\n");

printf("\t\t~\n");

printf("\t\t 1: Add\n");

printf("\t\t 2: Sub\n");

printf("\t\t 3: Multiply\n");

printf("\t\t 4: Divide\n");

printf("\t\t 5: Exit\n\n\n");

printf("\t\t Enter the choice: ");

scanf("%d", &ch);

if(ch==5)

exit(0);

printf("\nEnter first number: ");

scanf("%d", &a);

printf("\nEnter Second number: ");

scanf("%d", &b);

printf("\na = %d; b = %d;\n", a, b);

printf("==============\n\n");

switch(ch)

{

case 1 :

d=sum(a,b);

printf("Sum %d + %d = %d",a,b,d);

break;

case 2:

d=sub(a,b);

printf("Subtraction %d - %d = %d",a,b,d);

break;

case 3:

d=mul(a,b);

printf("Multiplication %d * %d = %d",a,b,d);

break;

case 4 :

d=div1(a,b);

printf("Division %d / %d = %d",a,b,d);

break;

default:

printf("Invalid Choice!");

getch();

}

getch();

return 0;

}

int sum(int a, int b) {

return a + b;

}

int sub(int a, int b) {

return a - b;

}

int mul(int a, int b) {

return a * b;

}

int div1(int a, int b) {

return a / b;

}