Menu-driven Calculator

C Program

1.Using if else statement

#include <stdio.h>
#include <stdlib.h>
int main()
{
    float num1,num2;
    int choice;
    printf("Enter First Number:");
    scanf("%f",&num1);
    printf("Enter Second Number:");
    scanf("%f",&num2);
    printf("press:\n");
    printf("1.For Addition\n2.For Subtration\n3.For Division\n4.For Multiplication\n");
    scanf("%d",&choice);
    if(choice==1)
        printf("Addition of %f and %f is %f",num1,num2,(num1+num2));
    else if(choice==2)
         printf("Subtraction of %f from %f is %f",num1,num2,(num1-num2));
    else if(choice==3)
         printf("Division of %f from %f is %f",num1,num2,(num1/num2));
    else if(choice==4)
         printf("Multiplication of %f and %f is %f",num1,num2,(num1*num2));
    else
        printf("Please enter correct choice");
}

2.Using Switch statement

#include <stdio.h>
#include <stdlib.h>
int main()
{
    float num1,num2;
    int choice;
    printf("Enter First Number:");
    scanf("%f",&num1);
    printf("Enter Second Number:");
    scanf("%f",&num2);
    printf("press:\n");
    printf("1.For Addition\n2.For Subtration\n3.For Division\n4.For Multiplication\n");
    scanf("%d",&choice);
    switch(choice)
    {
        case 1:  printf("Addition of %f and %f is %f",num1,num2,(num1+num2));
                 break;
        case 2:   printf("Subtraction of %f from %f is %f",num1,num2,(num1-num2));
                 break;
        case 3:  printf("Division of %f from %f is %f",num1,num2,(num1/num2));
                 break;
        case 4: printf("Multiplication of %f and %f is %f",num1,num2,(num1*num2));
                 break;
        default:  printf("Please enter correct choice");

    }
}