字符串截取

今天踩的坑：
1、sacnf比cin速度快
2、字符串截取
3、单词逆序题目错误代码存档

#include<iostream>
#include<algorithm>
#include<string>
using namespace std;

int main() {
	string s;
	while (getline(cin, s)) {
		int count = 0;
		string s1;
		for (int i = 0, j = 0; i < s.size(); ++i) {
			if (s[i] != ' ' && isalpha(s[i])) {
				count++;
			}
			if (s[i] == ' ' || i == s.size() - 1) {
				s1 = s.substr(j, count);
				reverse(s1.begin(), s1.end());
				cout << s1;
				j = i + 1;
				count = 0;
			}
			if (!isalpha(s[i])) {
				cout << s[i];
				continue;
			}
		}
		cout << endl;
	}
}

4、单词改错错误代码存档

#include<iostream>
#include<string>
using namespace std;

int fun(string cs, string ws) {
	if (cs == ws) {
		cout << "OK!";
	}
	else {
		if (cs.size() == ws.size()) {
			for (int i = 0; i < ws.size(); ++i) {
				if (cs[i] != ws[i]) {
					cout << i + 1 << " change " << cs[i];
					return 0;
				}
			}
		}
		else if (cs.size() > ws.size()) {
			for (int i = 0; i < ws.size(); ++i) {
				if (cs[i] != ws[i]) {
					cout << i + 1 << " insert " << cs[i];
					return 0;
				}
			}
		}
		else {
			for (int i = 0; i < cs.size(); ++i) {
				if (cs[i] != ws[i]) {
					cout << i << " delete " << ws[i];
					return 0;
				}
			}
			cout << ws.size() - 1 << " delete " << ws[ws.size() - 1];
		}
	}
	return 0;
}

int main() {
	string str;
	while (cin >> str && str != "END") {
		int n;
		cin >> n;
		for (int i = 1; i <= n; ++i) {
			string s;
			cin >> s;
			cout << i << " ";
			fun(str, s);
			cout << endl;
		}
	}
}