C Program To Demonstrate Simple Calculator

 SIMPLE CALCULATOR

Code :

#include<stdio.h>

int main()
{
    float cal,ch, num1, num2;
   
    printf("==========================================\n");
    printf("\t    SIMPLE CALCULATOR\n");
    printf("==========================================\n");
    printf("Enter two numbers: ");
    scanf("%f %f", &num1, &num2);
    printf("\n");
   
    printf("---------------------------\n");
    printf("\t   MENU\n");
    printf("---------------------------\n");
    printf("1. Addition\n");
    printf("2. Subtraction\n");
    printf("3. Multiplication\n");
    printf("4. Division\n");
    printf("---------------------------\n\n");
   
    printf("Instructions :\nTo make any calculation of above\n just simply enter its serial number.\n\n");
    printf("Choice : ");
    scanf("%f", &ch);
    printf("\n");
   
    if(ch == 1)
    {
        cal = num1 + num2;
       
        printf("Addition = %.2f\n", cal);
    }
    else if(ch == 2)
    {
        cal = num1 - num2;
        printf("Subtraction = %.2f\n", cal);
    }
    else if(ch == 3)
    {
        cal = num1 * num2;
        printf("Multiplication = %.2f\n", cal);
    }
    else if(ch == 4)
    {
        cal = num1 / num2;
        printf("Division = %.2f\n", cal);
    }
    else
    {
       printf("Error !! Invalid Choice.\n");
    }
    printf("-----------------------------------------\n");
    return 0;
}

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