OpenHarmony应用使用NativeC++无法读文件

int ret = -1;
if (fd_log != nullptr)
	return 0-1;
if ((fd_log = fopen(LOG_FILE, "a+")) == nullptr) {
	printf("open file failed!\n");
} else {
	printf("open file successed!\n");
    ret = 0;
}
return ret;
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