if (fp=fopen("fa.dat","r")==NULL)这样的技巧还是少用为好，编译器通常会提示Warning

另外fopen里第二个参数为r是不能写入内容的


DevC++ 4992 编译通过 运行正常

#include<stdio.h>
#include<stdlib.h>

const char * path = "D:\\\\Users\\\\MiniLight\\\\Desktop\\\\New Text Document.txt";

using namespace std;

int main(int argc, char *argv[])
{
    FILE *fp;
    char ch;

    fp = fopen(path, "wb+");
    if (fp == NULL) {
        printf("Can't open this file!\\n");
        exit(0);
    }

    do {
        ch = getchar();
        fputc(ch, fp);
    }
    while (ch != '@');

    fclose(fp);
    system("[s:9]AUSE");
    return EXIT_SUCCESS;
}