從一個文字檔中一行一行印出內容文字

enter

#include <stdio.h>
#include <conio.h>

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

char str[80];
FILE *fp;

fp=fopen(argv[1],"r");
do{
if((fgets(str,70,fp))==NULL) break;
puts(str);
getch();
}
while(1);

return 0;
}

enter

#include <stdio.h>

int main(void){

FILE *fp;
char filename[80];
int i;
char ch,ch1;

printf("enter file:\n");
gets(filename);
fp=fopen(filename,"r");

while(!feof(fp)) //為何這裡如果用 while(fp)結果竟然會成無窮迴圈列印下去？
{
ch=fgetc(fp);
printf("%c",ch);
if(ch=='\n')
{
printf("go on? Y/N?");
scanf("%c",&ch1);
if(toupper(ch1)=='N') exit(1);
}
}
fclose(fp);
return 0;
}