int main(int argc,char *argv[])

argc 参数个数
argv 参数字符串数组

第一个参数为 程序路径及名称



#include<stdio.h>
int main(int argc,char *argv[]){
  printf("argc=%d\n",argc);
  
  for (int i=0;i<argc;i++){ 
    printf("argv[%d]=%s\n",i,argv[i]);  
  }
  return 0;
}


./a.out a b c
argc=4
argv[0]=./a.out
argv[1]=a
argv[2]=b
argv[3]=c


./a.out 'a b c'
argc=2
argv[0]=./a.out
argv[1]=a b c


./a.out "a b c"
argc=2
argv[0]=./a.out
argv[1]=a b c