switch case statement

#include<stdio.h>

int main()

{

    int x,y;

    char n;

    printf("enter digits: ");

    scanf("%d%d",&x,&y);

    printf("which operation would you like?\n");

    printf("enter + for addition\n");

    printf("enter - for substraction\n");

    printf("enter * for multiplication\n");

    printf("enter / for division\n");

    printf("enter '%%' for remainder\n");

    printf("enter your choice: \n");

    scanf(" %c",&n); // Note the space before %c

    switch(n)

    {

    case '+':

        printf("addition: \n");

        printf("%d",x+y);

        break;

    case '-':

        printf("substraction: \n");

        printf("%d",x-y);

        break;

    case '*':

        printf("multiplication: \n");

        printf("%d",x*y);

        break;

    case '/':

        printf("division: \n");

        printf("%.2f",(float)x/y);

        break;

    case '%':

        printf("remainder: \n");

        printf("%d",x%y);

        break;

    default:

        printf("invalid input");

    }

}

#include<stdio.h>

int main()

{

    int n,x,y;

    printf("enter digits: ");

    scanf("%d%d",&x,&y);

    printf("which operation would you like?\n");

    printf("enter 1 for addition\n");

    printf("enter 2 for substraction\n");

    printf("enter 3 for multiplication\n");

    printf("enter 4 for division\n");

    printf("enter your choice: \n");

    scanf("%d",&n);

    switch(n)

    {

    case 1:

        printf("addition: \n");

        printf("%d",x+y);

        break;

    case 2:

        printf("substraction: \n");

        printf("%d",x-y);

        break;

    case 3:

        printf("multiplication: \n");

        printf("%d",x*y);

        break;

    case 4:

        printf("division: \n");

        printf("%.2f",(float)x/y);

        break;

    default:

        printf("invalid input");

    }

}

#include<stdio.h>

int main()

{

    int n;

    float r,PI=3.1416;

    float a,b,base,height;

    printf("which operation would you like?\n");

    printf("enter 1 for circle\n");

    printf("enter 2 for triangle\n");

    printf("enter 3 for rectangle\n");

    printf("enter your choice: \n");

    scanf("%d",&n);

    switch(n)

    {

    case 1:

        printf("circle: \n");

        printf("enter radius: \n");

        scanf("%f,&r");

        printf("%.2f",PI*r*r);

        break;

    case 2:

         printf("triangle: \n");

         printf("enter base and height: \n");

         scanf("%f%f",&base,&height);

        printf("%.2f",0.5*base*height);

        break;

     case 3:

         printf("rectangle: \n");

         printf("enter height and length: \n");

         scanf("%f%f",&a,&b);

        printf("%.2f",a*b);

        break;

    default:

        printf("invalid input");

    }

}