int main(int argc, char *argv[]) {
std::cout << "int 大小: " << sizeof(int) << std::endl;
std::cout << "size_t 大小: " << sizeof(size_t) << std::endl;
std::cout << "void * 大小: " << sizeof(void *) << std::endl;
// 1 MB 临时数据
const size_t t_size = 1024 * 1024;
char *t_data = new char[t_size];
std::stringstream body;
// 写入 1 GB
for (size_t i = 0; i < 1024; i++) {
body.write(t_data, t_size);
}
std::cout << "文件大小 1: " << body.str().size() << std::endl;
// 再写入 1 GB, 到达临界
for (size_t i = 0; i < 1024; i++) {
body.write(t_data, t_size);
}
std::cout << "文件大小 2: " << body.str().size() << std::endl;
// 再写入 1 MB, 大小不再改变
body.write(t_data, t_size);
std::cout << "文件大小 3: " << body.str().size() << std::endl;
delete[] t_data;
return 0;
}
