以循环中index作为名称创建文件并保存数据

for (int i - 0; i < 10; ++i) {
	char filePath[100] = "./";
	char index[1] = { 0 };
	sprintf(index, "%d", i);
	strcat(filePath, index);
	strcat(filePath, ".txt");
	ofstream f(filePath);
	f << data << endl;
}