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argc与**argv理解

//argv_test.c

#include<stdio.h>

int main(int argc,char **argv)//指向字符串的指针
{
 unsigned  int a;
 unsigned short uchar[2];
 uchar[0] = *argv[1];
 uchar[1] = *argv[2];

 a= atoi(argv[1]);
 printf("a = %d *argv[1] %c *argv[2] %c argc=\n",a,*argv[1],*argv[2],argc);
 return 0;
}

gcc -o argv_test argv_test.c
./argv_test 1 2
打印输出 a=1 *argv[1]=1 *argv[2]=2;argc=3;
argc为输入参数个数,**argv中为输入的字符串内容,**argv是一个指向字符串的指针,其大小没有固定,可以换成另一种格式*argv[].

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