C program for arithmetic operations using switch case and do while loop

A switch case is used to select one among multiple options.

To perform arithmetic operations, we create case for each operator, for matching operator it will call appropriate case statement and execute the statements.

In our program we will use switch case statement and do while loop statement

You can check both details here

C program for arithmetic operations using switch case

Lets see steps to write this C program

Declare variables
start loop
get num1 ,operator, num2 value from user
start switch case and pass operator in switch case
write case for arithmetic operators and its associated statements
define default in switch case
Take input from user to check loop continuity
if user enters yes the repeat step 2-7 else end the loop.

#include<stdio.h>

int main() {
    int num1,num2;
    char c,ch;
    do{
       printf("\nEnter Num1 Operator [+,-,*,/] Num2 \n");
       scanf("%d %c %d",&num1,&c,&num2);

    switch(c){
        case '+':
                 printf("\n%d+%d=%d",num1,num2,num1+num2);
                 break;

        case '-':
                 printf("\n%d-%d=%d",num1,num2,num1-num2);
                 break;

        case '*':
                 printf("\n%d*%d=%d",num1,num2,num1*num2);
                 break;

        case '/':
                 printf("\n%d/%d=%f",num1,num2,(float)num1/num2);
                 break;

        default:
                 printf("\nEnter valid operation : +, -, *, /");
    }
    printf("\nEnter y to continue other character to end\n");
    getchar();
	scanf("%c",&ch);
    }while(ch=='y');
}

#include<stdio.h>

int main() {

int num1,num2;

char c,ch;

do{

printf("\nEnter Num1 Operator [+,-,*,/] Num2 \n");

scanf("%d %c %d",&num1,&c,&num2);

switch(c){

case '+':

printf("\n%d+%d=%d",num1,num2,num1+num2);

break;

case '-':

printf("\n%d-%d=%d",num1,num2,num1-num2);

break;

case '*':

printf("\n%d*%d=%d",num1,num2,num1*num2);

break;

case '/':

printf("\n%d/%d=%f",num1,num2,(float)num1/num2);

break;

default:

printf("\nEnter valid operation : +, -, *, /");

}

printf("\nEnter y to continue other character to end\n");

getchar();

scanf("%c",&ch);

}while(ch=='y');

}

Output

Enter Num1 Operator [+,-,*,/] Num2
2 + 2

2+2=4
Enter y to continue other character to end
y

Enter Num1 Operator [+,-,*,/] Num2
3 * 2

3*2=6
Enter y to continue other character to end
y

Enter Num1 Operator [+,-,*,/] Num2
 5 - 1

5-1=4
Enter y to continue other character to end
y

Enter Num1 Operator [+,-,*,/] Num2
5 / 6

5/6=0.833333
Enter y to continue other character to end
y

Enter Num1 Operator [+,-,*,/] Num2
1 + 2

1+2=3
Enter y to continue other character to end
n