Question

Write a program to implement calculator with following operations using switch case
1. add two numbers
2. subtract two numbers
3. multiply two numbers
4. divide two numbers 

Answer 1

#include <stdio.h>
#include<conio.h>
void main()
{
int num1,num2;
float result;
char ch;
clrscr();
printf("Enter first number: ");
scanf("%d",&num1);
printf("Enter second number: ");
scanf("%d",&num2);
printf("Choose operation to perform (+,-,*,/): ");
scanf(" %c",&ch);
result=0;
switch(ch)
{
case '+':
result=num1+num2;
break;
case '-':
result=num1-num2;
break;
case '*':
result=num1*num2;
break;
case '/':
result=(float)num1/(float)num2;
break;
default:
printf("Invalid operation.\n");
}
printf("Result: %d %c %d = %f\n",num1,ch,num2,result);
getch();
}

 

Output: Enter first number: 10 Enter second number: 3 Choose operation to perform (+,-,*,/,%): / Result: 10 / 3 = 3.333333