hello.c

C Primer Plus 第五版书中的代码

/* hello.c -- converts command-line argument to number */
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    int i, times;
    
    if (argc < 2 || (times = atoi(argv[1])) < 1)
        printf("Usage: %s positive-number\n", argv[0]);
    else
        for (i = 0; i < times; i++)
            puts("Hello, good looking!");
  
    return 0;
}