ZOJ 1151 Word Reversal反转单词 (string字符串处理)
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链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=151
For each list of words, output a line with each word reversed without changing the order of the words.
This problem contains multiple test cases!
The first line of a multiple input is an integer N, then a blank line followed by N input blocks. Each input block is in the format indicated in the problem description. There is a blank line between input blocks.
The output format consists of N output blocks. There is a blank line between output blocks.
Input
You will be given a number of test cases. The first line contains a positive integer indicating the number of cases to follow. Each case is given on a line containing a list of words separated by one space, and each word contains only uppercase and lowercase letters.
Output
For each test case, print the output on one line.
Sample Input
1
3
I am happy today
To be or not to be
I want to win the practice contest
Sample Output
I ma yppah yadot
oT eb ro ton ot eb
I tnaw ot niw eht ecitcarp tsetnoc
本程序包含多组测试数据;
输入数据的第一行是一个整数N,然后是一空行,后面跟着N个数据块,每个数据块的格式在程序描述中说明了,数据块中有一空行。
输出格式由N个输出块组成,每个输出块之间有一空行;
输入描述:
现给你多组测试数据,第一行是一个正整数,表示接下来测试数据的组数,每组测试占一行,包含一串单词,中间用一个空格隔开,每个单词仅包含大写和小写字母;
输出描述:
每组测试数据都打印在一行上;
#include <iostream>#include <string>#include <cstdio>#include <algorithm>using namespace std;string s, t;int n, cas, flag = 0;char ss[1000];int main(){ cin >> cas; while(cas--) { scanf("%d", &n); getchar(); while(n--) { cin.getline(ss, 1000); s = ss; flag = 0; t.clear(); for(int i=0; i<s.size(); i++) { if(s[i] != ' ' && i <= s.size()-1) { t += s[i]; }else { reverse(t.begin(), t.end()); if(flag) cout << " "; cout << t; flag = 1; t.clear(); } } reverse(t.begin(), t.end()); cout << " " << t << endl; } if(cas) cout << endl; } return 0;}
反转单词的另一种变形,思路都是差不多,一般在笔试面试题中经常会遇到,而且会直接让你写出代码,以下是小灰灰在腾讯面试的时候碰到的一道题:
#include <iostream>#include <cstdio>#include <string>#include <cstring>#include <cstdlib>#include <algorithm> //使用reverse需要的头文件#define MAXN 10010#define RST(N)memset(N, 0, sizeof(N))using namespace std;int main(){ freopen("data_in.txt", "r", stdin); //文件输入输出流重定向 freopen("data_out.txt", "w", stdout); string str; while(getline(cin, str)) { //每次读入一行文本 int len = str.length(); int flag = 0; string s; s.clear(); //使用前记得清空 for(int i=len-1; i>=0; i--) { if(str[i]!=' ') { s += str[i]; }else { if(s.empty()) continue; //判断字符串是否为空,去掉单词之间多余的空格 reverse(s.begin(), s.end()); //反转 if(flag) cout << " " << s; //控制输出格式 else cout << s; flag = 1; s.clear(); //每次清空容器 } } reverse(s.begin(), s.end()); //第一个单词放在最后输出 cout << " " << s << endl; } fclose(stdin); fclose(stdout); return 0;}
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