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xiaoxiao2022-06-11  33

心得:0. 注意printf和endl 的缓冲区别!

           1.注意swap和sort的细节,调试了半天,就是因为不注意细节,比如下面这个,低级错误。。。。不能再犯!

void stand() { if (x > y) { int temp = x; x = y; y = x; } }

         2.注意C++的封装特性,比如定义了< 、> 、== 、 sort这些函数,把实现封装之后,易于调试!    

 

 

虽然别人都说是水题。。。果然还是我太菜了,虽然样例输出正确,但总是WA,弄得很烦躁

昨天"蛙"(wa)声一片,今天重新做了一遍,终于AC了,写的类很粗糙,定义了自己的sort函数和swap函数。

先将六个面排序,然后根据六面体的特性,用flag作为标志位,控制输入输出。

#include<iostream> #include<string> using namespace std; struct face { int x; int y; void stand() { if (x > y) { int temp = x; x = y; y = temp; } } }; int theswap(face&a, face& b); bool operator== (face& a, face& b); bool operator< (face& a, face& b); bool operator> (face& a, face& b); int thesort(face* box); face box[6]; int main(void) { while (cin >> box[0].x >> box[0].y >> box[1].x >> box[1].y >> box[2].x >> box[2].y >> box[3].x >> box[3].y >> box[4].x >> box[4].y >> box[5].x >> box[5].y) { for (int i = 0; i < 6; i++) { box[i].stand(); } thesort(box); int flag = 0; if (box[0] == box[1] && box[2] == box[3] && box[4] == box[5] && box[0].x == box[2].x && box[0].y == box[4].x && box[2].y == box[4].y) flag = 1; if (flag) printf("POSSIBLE\n"); else printf("IMPOSSIBLE\n"); flag = 0; } } bool operator== (face& a, face& b) { return (a.x == b.x && a.y == b.y); } bool operator< (face& a, face& b) { if (a.x > b.x) return false; else if (a.x < b.x) return true; else if (a.y > b.y) return false; else if(a.y < b.y) return true; else false; } bool operator> (face& a, face& b) { return !(a < b) && !(a == b); } int theswap(face&a, face& b) { int temp = a.x; a.x = b.x; b.x = temp; temp = a.y; a.y = b.y; b.y = temp; return 0; } int thesort(face* box) { for (int i = 0; i < 6; i++) { for (int j = 0; j < 5 - i; j++) { if (box[j] > box[j + 1]) theswap(box[j], box[j + 1]); } } return 0; }

 

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