C Primer Plus（第六版）13.10 复习题 第5题

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define SIZE 256

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

{

int i=0;

char ch;

char strSIZE;

FILE *fp;

if (argc != 3)

exit(EXIT_FAILURE);

else

{

if ((fp = fopen (argv2,"r")) == NULL)

exit(EXIT_FAILURE) ;

while(fgets(str,SIZE,fp))

{

if(strchr(str,argv10))

{

printf("%s",str);

memset(str,0,sizeof(str));//清空字符串

}

else

memset(str,0,sizeof(str));

}

i++;

}

fclose(fp);

return 0;

}