函数名: vfscanf

功 能: 从流中执行格式化输入

用 法: int vfscanf(FILE *stream, char *format, va_list param);

程序例:

#include

#include

#include

FILE *fp;

int vfsf(char *fmt, ...)

{

va_list argptr;

int cnt;

va_start(argptr, fmt);

cnt = vfscanf(fp, fmt, argptr);

va_end(argptr);

return(cnt);

}

int main(void)

{

int inumber = 30;

float fnumber = 90.0;

char string[4] = "abc";

fp = tmpfile();

if (fp == NULL)

{

perror("tmpfile() call");

exit(1);

}

fprintf(fp,"%d %f %s\",inumber,fnumber,string);

rewind(fp);

vfsf("%d %f %s",&inumber,&fnumber,string);

printf("%d %f %s\",inumber,fnumber,string);

fclose(fp);

return 0;

}