C语言中给main函数传递参数

相信大家用C语言定义main函数时,大多数人的写法都是int main(void)。其实main函数是可以向其传递参数的,给个实例:

//给main函数传参实例:
 
#include <stdio.h>
 #include <string.h>
 
//int main(int argc, char *argv[])
 int main(int argc, char **argv)
 {
    char *array[3]  = {"./main", "hello", "world"};       

    if (argc < 2)
    { 
        printf("error!\n");
        printf("./main str\n");
 
        return -1;
    }
 
    printf("The first string of your command is:%s\n", argv[0]);
    printf("The second string of your command is:%s\n", argv[1]);
    printf("The third string of your command is:%s\n", argv[2]);
   
    if (!strcmp(argv[0], array[0]))
    {
        printf("The first command execute successfully!\n");   
    }
    if (!strcmp(argv[1], array[1]))
    {
        printf("The second command execute successfully!\n");   
    }
    if (!strcmp(argv[2], array[2]))
    {
        printf("The third command execute successfully!\n");
    }
 
    return 0;
  }
 
输出结果:
 (1)若输入命令为:./main
      则输出结果为:
      error!
      The command is:./main
 (2)若输入命令为:./main hello world
    则输出结果为:
      The first string of your command is:./main
      The second string of your command is:hello
      The third string of your command is:world
 
    The first command execute successfully!
      The second command execute successfully!
      The third command execute successfully!
 
大家可以利用这个程序模型干很多事呢!

将C语言梳理一下,分布在以下10个章节中:

  1. Linux-C成长之路(一):Linux下C编程概要 http://www.linuxidc.com/Linux/2014-05/101242.htm
  2. Linux-C成长之路(二):基本数据类型 http://www.linuxidc.com/Linux/2014-05/101242p2.htm
  3. Linux-C成长之路(三):基本IO函数操作 http://www.linuxidc.com/Linux/2014-05/101242p3.htm
  4. Linux-C成长之路(四):运算符 http://www.linuxidc.com/Linux/2014-05/101242p4.htm
  5. Linux-C成长之路(五):控制流 http://www.linuxidc.com/Linux/2014-05/101242p5.htm
  6. Linux-C成长之路(六):函数要义 http://www.linuxidc.com/Linux/2014-05/101242p6.htm
  7. Linux-C成长之路(七):数组与指针 http://www.linuxidc.com/Linux/2014-05/101242p7.htm
  8. Linux-C成长之路(八):存储类,动态内存 http://www.linuxidc.com/Linux/2014-05/101242p8.htm
  9. Linux-C成长之路(九):复合数据类型 http://www.linuxidc.com/Linux/2014-05/101242p9.htm
  10. Linux-C成长之路(十):其他高级议题

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