C Programming to read three numbers and display greater one

/*to read 3 numbers and display greatest one*/
#include<stdio.h>
#include<stdlib.h>
int main( )
{
    float a,b,c;
    printf ("enter the numbers: ");
    scanf ("%f%f%f",&a,&b,&c);
    if (a>b&&a>c)
        printf ("%f is greatest",a);
    else if (b>c)
        printf ("%f is greatest",b);
    else
        printf ("%f is greatest",c);
    system ("pause");
    return 0;
}