wenjian.c

来自「一个linux下用c 写得读取路由表的小程序。」· C语言 代码 · 共 42 行

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
main( )
{
FILE *fp;
char ch;
char *str[13];
char str1[15];
int m;
int i=1,j=0;
system("route >/root/routetable");
if ((fp=fopen("/root/routetable","rt"))==NULL)
{
printf("cannot open file! \nplease strike any key exit !");
getchar();
exit(1);
}
ch=fgetc(fp);
while(ch!=EOF)
{
if((ch=='\n')&&(i!=0))
{i--;
ch=fgetc(fp);
continue;
}
if((ch=='\n')&&(i==0))
{
fgets(str1,12,fp);
str[j]=strdup(str1);
j++;
ch=fgetc(fp);
continue;
}
ch=fgetc(fp);
}
m=j;
for(j=0;j<m-1;j++)
printf("%s\n",str[j]);
fclose(fp);
}