//用fopen()函数以读的方式打开，如果文件句柄为NULL，则该文件不存在咯！//希望对您有所帮助！！include <stdio.h> include <stdlib.h> int main(){ FILE *fp;if ((fp=fopen("test.txt", "r")) == NULL)printf("File test.txt not exists.\n");else printf("File test.txt exists...