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  • LinuxC下argv,argc[]的意义

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    LinuxC下argc,argv[ ]的意义

    参考了http://blog.csdn.net/followingturing/article/details/7707584

    还是根据实例来进行说明:

     1 #include<stdio.h>  
     2 #include<stdlib.h>
     3 
     4 int main(int argc,char *argv[]) 
     5 { 
     6     if(argc==1 || argc>2)
     7     { 
     8         printf("Please input the name of the file 
     9                 you want to edit, for example:./edit fillen
    "); 
    10         printf("argv[0] is %s
    ",argv[0]);
    11     } 
    12 
    13     if(argc==2) 
    14     { 
    15         printf("Now EDIT %s
    ",argv[1]); 
    16         printf("argv[0] is %s
    ",argv[0]);
    17         printf("argv[1] is %s
    ",argv[1]);
    18     } 
    19 
    20     exit(0);
    21 }
    • 通过gcc生成可执行文件edit如下:
    • 运行文件edit:./edit,如下:
    • 运行文件edit,并输入file.txt: ./edit file.txt,如下:

    结论:

    1. argc 为外部命令参数的个数,因此

      输入命令./edit时,argc==1;
      输入命令./edit file.txt时,argc==2;

    2. argv[]为存储的命令,其中argv[0]即为可执行文件名;

      输入命令./edit时,argv[0]=="./edit";
      输入命令./edit file.txt时,argv[0]=="./edit",argv[1]=="file.txt";

    2017-2-4 23:10;20

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  • 原文地址:https://www.cnblogs.com/WangAoBo/p/6366600.html
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