How to use floating arithmetic operator in c language

#include<stdio.h>
int main()
{
    float a=12.4,b=3.8;
    printf("sum=%.2f\n",a+b);
    printf("difference=%.2f\n",a-b);
    printf("product=%.2f\n",a*b);
    printf("a/b=%.2f\n",a/b);
    return 0;
}