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7-34 delete duplicate characters (set usage) & 7-35 count the number of characters (unordered_map)

2022-04-22 08:25:00 【Shanlan ～】

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#include <bits/stdc++.h>
using namespace std;
int main()
{
    
    set<char> s;
    char x;
    while((x = getchar())!='\n')
    {
    
        s.insert(x);
    }
    for(auto it :  s)
        cout << it;
}

This is where you read in the blanks , Cannot add ：

while(cin>> x)

A single character containing a space should know how to write ;

Topic two
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#include <bits/stdc++.h>
using namespace std;
int main()
{
    
    string s;
    getline(cin,s);
    char x;
    x = getchar();
    unordered_map <char, int> hash;
    for(int i = 0 ; i < s.size() ; i ++)
    {
    
        hash[s[i]]++;
    }
    cout << hash[x] << endl;
}

版权声明
本文为[Shanlan ～]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/04/202204220712432437.html

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