解题思路:在while(1)大循环中,没有结果不出来
注意事项:数组要赋初值
参考代码:
#include "iostream" using namespace std; #define MAXSIZE 1000 int main() { long system, num;/*几进制,数字*/ int oper1[MAXSIZE]={0}, oper2[MAXSIZE]={0}; long tmp, i, top = 0,step = 0; cin >> system >> num; tmp = num; while(tmp) { oper1[top++] = tmp % 10; tmp /= 10; } while(1) { for(i=0;i<top;i++) oper2[i] = oper1[i] + oper1[top-1-i];/*num和镜像的num首位相加*/ for(i=0;i<top;i++) { if(oper2[i] >= system) { oper2[i] -= system; oper2[i+1]++; if(i==top-1) top++;/*首位超过进制,长度得+1*/ } oper1[i] = oper2[i];//为下一次循环做准备 } oper1[i] = oper2[i];step++;/*保证长度+1的情况也可以*/ int mark = 1; for(i=0;i<top/2;i++) { if(oper2[i]!=oper2[top-1-i]) { mark = 0;break; } } if(mark&&step<=30) { cout << "STEP=" << step << endl; break; } if(step > 30) { cout << "Impossible!" << endl; break; } } }
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