编写一个程序，打开一个文本文件，文件名通过交互方式获得。建立

#include <stdio.h>
#include <stdlib.h>
#define MAX 81
int main(void)
{
 char name[30],content[MAX];
 int row,column;
 FILE *fp;
 printf("input the name of file:");
 gets(name);
 if(  ( fp=fopen(name,"r") )   == NULL   )
 {
 printf("Can't open %s",name);
 exit(1);
 }
 printf("input the row and column to output:");
 while ( scanf("%d%d",&row,&column) == 2 )
 {
 row--,column--;
 fseek(fp,0,SEEK_SET);
 while (row--) fgets(content,MAX,fp);//简便起见，未做一些越界判断
 fseek(fp,column,SEEK_CUR);
 fgets(content,MAX,fp);
 printf(content);
 printf("input the start position to output:");
 }
 printf("Quit\n");
 return 0;
}