try catch异常处理例子

以下是看Think in C++而写的测试例子

#include <iostream>using namespace std;class MyErr{private:const char* const data;public:MyErr(const char* const msg = 0):data(msg){}void show(){cout << data <<endl;}};void foo(){int i;cout << "输入一个大于0小于8的整数:";cin >> i;if(i < 0)throw MyErr("输入不大于0");else if(i >= 8)throw MyErr("输入不小于8");cout << "ok" <<endl;}void foo2(){foo();}int main(int argc, char *argv[]){try{foo2();}catch(MyErr &e){e.show();}return 0;}