ORIGIN

HDU-2026 首字母变大写

2020-07-10

ACM Force HDU stringstream 1 mins330 words

首字母变大写

输入一个英文句子，将每个单词的第一个字母改成大写字母。

Input

输入数据包含多个测试实例，每个测试实例是一个长度不超过100的英文句子，占一行。

Output

请输出按照要求改写后的英文句子。

Sample Input

1 2	i like acm i want to get an accepted

Sample Output

1 2	I Like Acm I Want To Get An Accepted

Analysis

traverse the string to upper the letters.

The point of this problem is to input a string with spaces.

If you use string, you can use
1
getline(cin, string);
If you use char array, you can use
1
cin.getline(str,len);
Since you don’t know the length, you choose the first one;

And another thing is that to make the letter an uppercase letter, you can just make the character minus 32 which means subtract the ascii code.

eg. 'a' - 32 = 'A'
using stringstream to traverse words.

stringstring can make the sentence sperate by spaces or other special character.

Code

Method 1: traverse letters.

#include<bits/stdc++.h>

using namespace std;

int main() {
	string sentence;
	while(getline(cin, sentence)) {
		sentence[0] -= 32;
		for(int i = 1; i < sentence.length(); i ++) {
			if(sentence[i - 1] == ' ') {
				sentence[i] -= 32;
			}
		}
		cout << sentence << endl;
	}
	return 0;
}

Method 2: traverse words.

#include<bits/stdc++.h>

using namespace std;

int main() {
	string sentence, word;
	while(getline(cin, sentence)) {
		stringstream ss(sentence);
		ss >> word;
		word[0] -= 32;
		cout << word;
		while(ss >> word) {
			word[0] -= 32;
			cout << " " << word;
		}
		cout << endl;
	}
	return 0;
}