Write a program to that performs as calculator (Addition, Multiplication, Division, Subtraction)

The program will request the user to enter two number digits and the user select an operator to perform the addition, subtraction, multiplication, and division of the entered number by the user and displays the output on the screen. The program will display the result according to the user selection. 

• Program:

#include<stdio.h>
#include<conio.h>

int main()
{
    int a,b,n,s,m,d;

    printf("Enter the first number :");
    scanf("%d",&a);

    printf("Enter the second number :");
    scanf("%d",&b);

    printf("Addition of two number is : %d\n",n=a+b);
    printf("Subtraction of two number is : %d\n",s=a-b);
    printf("Multiplication of two number is : %d\n",d=a*b);
    printf("Divination of two number is : %d\n",d=a%b);
    
    getch();
    return 0;
}

Enter the first number :5
Enter the second number :7
Addition of two number is : 12
Subtraction of two number is : -2
Multiplication of two number is : 35
Divination of two number is : 5

1. When we divide two integers in C language we get integer result for example 5/2 evaluates to 2. 
2. As a general rule integer/integer = integer and float/integer = float or integer/float = float. 
3. So we convert denominator to float in our program, you may also write float in numerator. This is known as explicit conversion typecasting.