goto是一个糟糕的编程方式
少数情况,goto能解决别的方法不能解决的问题
少数情况,goto能解决别的方法不能解决的问题
多层循环嵌套用break也不行,goto可以退出嵌套的循环
//: C03:gotoKeyword.cpp // From Thinking in C++, 2nd Edition // Available at http://www.BruceEckel.com // (c) Bruce Eckel 2000 // Copyright notice in Copyright.txt // The infamous goto is supported in C++ #include <iostream> using namespace std; int main() { long val = 0; for(int i = 1; i < 1000; i++) { for(int j = 1; j < 100; j += 10) { val = i * j; if(val > 47000) goto bottom; // Break would only go to the outer 'for' } } bottom: // A label cout << val << endl; getchar(); } ///:~
输出
47047