Real_Calculator.c

#include<stdio.h>

int main()

{

int a;

int b;

char operator;

printf("Enter the first number:");

scanf("%d",&a);

while(1){

printf("\nEnter the operator (+,-,*,/):");

scanf(" %c",&operator); //note the space before %c to ignore any whitespace characters

printf("\nEnter the second number:");

scanf("%d",&b);

switch(operator)

{

    case '+':

        a = a+b;

        printf("result = %d",a);

        break;

    case '-':

        a=a-b;

        printf("result = %d",a);

        break;

    case '*':

        a=a*b;

        printf("result = %d",a);

        break;

    case '/':

        if(b==0)

            printf("Division by zero error!");

        else

            a = a/b;

            printf("result = %d",a);

        break;

    default:

        printf("Invalid operator!");

}

}

return 0;

}