这是书上代码,我是菜鸟,加了一行system("PAUSE");还是没有,求高手
/* print_it.c-this program prints a listing with line numbers!*/
#include<stdlib.h>
#include<stdio.h>
void do_heading(char *filename);
int line=0,page=0;
FILE *stdprn;
int main(int argv,char *argc[])
{
char buffer[256];
FILE *fp;
if(argv<2)
{
fprintf(stderr,"\nProper Usage is: ");
fprintf(stderr,"\nprint_it filename.ext\n");
return(1);
}
if ((fp=fopen(argc[1],"r"))==NULL)
{
fprintf(stderr,"error opening file, %s!",argc[1]);
return(1);
}
page=0;
line=1;
do_heading(argc[1]);
while(fgets(buffer,256,fp)!=NULL)
{
if(line%55==0)
do_heading(argc[1]);
fprintf(stdprn,"%4d:\t%s",line++,buffer);
}
fprintf(stdprn,"\f");
fclose(fp);
system("PAUSE");
return(0);
}
void do_heading(char*filename)
{
page++;
if(page>1)
fprintf(stdprn,"\f");
fprintf(stdprn,"page:%d,%s\n\n",page,filename);
}
有if(argv<2)呀
追答打开cmd 把程序放到cmd里面去运行 看一下在哪一行退出的