2.14 Relation between two variable

#include <stdio.h>
int main()
{
    float num1, num2;
    double val;
    char ch;
    printf("enter the first number : ");
    scanf("%f",&num1);
    printf("enter another number : ");
    scanf("%f",&num2);
    ch='+';
    val=num1+num2;
    printf("%0.2f %c %0.2f=  %0.2lf\n",num1,ch,num2, val);
    ch='-';
    val=num1-num2;
    printf("%0.2f %c %0.2f= %0.2lf\n",num1,ch,num2, val);
    ch='*';
    val=num1*num2;
    printf("%0.2f %c %0.2f=  %0.2lf\n",num1,ch,num2, val);
    ch='/';
    val=num1/num2;
    printf("%0.2f %c %0.2f=  %0.2lf\n",num1,ch,num2, val);

    return 0;
}