#include <stdio.h>
#include <stdlib.h>

int main( int argc, char **argv )
{
    float a, b;

    if ( argc != 3 ) {
        printf("You need 2 argments.\n");
        exit (EXIT_FAILURE);
    } else {
        a = atof(argv[1]);
        b = atof(argv[2]);
    }
    printf("%s times %s is %f.\n",argv[1],argv[2], a * b);
    return EXIT_SUCCESS;
}