【练习01】 简单题（1）1015

To and Fro

#include<iostream>
#include<string>
#include<fstream>
#include <string.h>
using namespace std;

int main(){
	string shuru;
	int column;

	//ifstream ifs("shuju.txt");

	while(cin>>column && column != 0){
		cin>>shuru;

		//ifs.ignore();
		//getline(ifs, shuru);

		char chongpai[105][25];
		int jiOu;
		int row = shuru.length() / column;
		if(shuru.length() % column != 0){
			row++;
		}
		if(row % 2 == 0){
			jiOu = 0;
		}else{
			jiOu = 1;
		}
		int i;
		int cishu;			
		cishu = row%2==0?(row/2):(row/2 + 1);
		int j;
		int k = 0;
		for(j = 0; j < cishu; j++){
			for(i = 0; i < column; i++){
				chongpai[2 * j][i] = shuru[k];
				k++;
			}
			i--;
			if(j == cishu - 1){
				if(jiOu == 1){
					break;
				}
			}
			for( ; i >= 0; i--){
				chongpai[2 * j + 1][i] = shuru[k];
				k++;
			}
		}
		for(int m = 0; m < column; m++){
			for(int n = 0; n < row; n++){
				cout<<chongpai[n][m];
			}
		}
		cout<<endl;
	}
	//system("pause");
	return 0;
}