有冇方法run完第一個function之後 run第二個function果時由頭read過d char
以下係program:
void fun1(char *fp)
{
ch1 = fgetc(fp);
while (ch1 != EOF)
{
....
}
fclose(fp);
}
void fun2(char *fp)
{
同fun1一樣......
}
main()
{
...
}
C Promgramming Read 野
2007-08-09 2:14 am
回答 (2)
2007-08-10 6:09 pm
✔ 最佳答案
What you use need is rewind() :void fun1(char *fp) {
ch1 = fgetc(fp);
while (ch1 != EOF)
{
....
}
// DO NOT close the file, otherwise rewind() does not work.
}
void fun2(char *fp) {
rewind(fp);
// start read at the beginning
}
main() {
...
fun1(fp);
fun2(fp);
fclose(fp);
}
2007-08-10 11:12 am
function2 唔好 pass 個 file ref.~
係function2 內 再開個file，就可以重頭再read char 多一次﹗
void fun2()
{
FILE * fp2;
fp2 = fopen ("myfile.txt","r")
ch2 = fgetc(fp2);
while (ch2 != EOF)
{
....
} // end of while loop
fclose(fp2);
} // end of function 2
係function2 內 再開個file，就可以重頭再read char 多一次﹗
void fun2()
{
FILE * fp2;
fp2 = fopen ("myfile.txt","r")
ch2 = fgetc(fp2);
while (ch2 != EOF)
{
....
} // end of while loop
fclose(fp2);
} // end of function 2
參考: 自己
收錄日期: 2021-04-23 17:14:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070808000051KK04514