牛客——查找字符串

B-你好，这里是牛客竞赛_牛客周赛 Round 59 (nowcoder.com)

返回值是子串或字符在 string 对象字符串中的位置

#include <bits/stdc++.h>

using namespace std;

int T;
string s;

int main() {
    cin >> T;
    
    while(T --) {
        cin >> s;
        
        if(!s.find("ac.nowcoder.com") || !s.find("https://ac.nowcoder.com"))
            cout << "Ac" << endl;
        else if(!s.find("www.nowcoder.com") || !s.find("https://www.nowcoder.com"))
            cout << "Nowcoder" << endl;
        else cout << "No" << endl;
    }
}

出问题代码

#include<bits/stdc++.h>
#include<cstdio>
#define int long long
using namespace std;#define IOS ios::sync_with_stdio(0),cin.tie(0),cout.tie(0)const int N = 2e5 + 10;signed main(){IOS;int t;cin >> t;while(t -- ){string s;cin >> s;string a1 = "https://";string b1 = "www.nowcoder";string b2 = "ac.nowcoder";for(int i = 0;i < s.length(); i ++ ) {if(s[i] == 'h') {for(int j =1; j < 8; j ++ ) {if(s[i+j] != a1[j] ) {cout << "No" << endl;break;}}}else if(s[i] == b1[0]) {int flag = 0;for(int j = 1; j < a1.length(); j ++ ) {if(s[i + j] != b1[j] ) {flag = 1;break;}}if(flag == 0) {cout << "Nowcoder" << endl;break;}else {cout << "No" << endl;break;}}else if(s[i] == b2[0]) {int flag = 0;for(int j = 1; j < b2.length(); j ++ ) {if(s[i +j] != b2[j]) {flag = 1;break;}}if(flag == 0) {cout << "Ac"<< endl;break;}else {cout << "No" << endl;break;}}}}return 0;
}

总结：

记住string类中可以查找字符串的方法

学习笔记 c++ （在String查找子串和字符 ）-CSDN博客