计算程序运行时间
#include <iostream>#include <ctime>int main() { clock_t start, end; start = clock(); // 执行需要计时的代码 end = clock(); double duration = double(end - start) / CLOCKS_PER_SEC; std::cout << "程序运行时间：" << duration << "秒" << std::endl; return 0;}#include <iostream>#include <ctime>void func() { clock_t start, end; start = clock(); // 执行需要计时的代码 end = clock(); double duration = double(end - start) / CLOCKS_PER_SEC; std::cout << "函数执行时间：" << duration << "秒" << std::endl;}int main() { func(); return 0;}#include <iostream>#include <ctime>int main() { clock_t start, end; start = clock(); // 执行操作1 end = clock(); double duration1 = double(end - start) / CLOCKS_PER_SEC; start = clock(); // 执行操作2 end = clock(); double duration2 = double(end - start) / CLOCKS_PER_SEC; std::cout << "操作1执行时间：" << duration1 << "秒" << std::endl; std::cout << "操作2执行时间：" << duration2 << "秒" << std::endl; return 0;}
