题解 | #计算某字符出现次数#

//https://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1?tpId=37&tqId=21225&rp=1&ru=/exam/oj/ta&qru=/exam/oj/ta&sourceUrl=%2Fexam%2Foj%2Fta%3FtpId%3D37&difficulty=undefined&judgeStatus=undefined&tags=&title=

#include <iostream>
#include <iostream>

using namespace std;

int main() {
    string s, s0;
    while (getline(cin, s)) {   //注意输入字符串的格式
        int sum = 0;

        for(auto &c:s)  //注意引用的使用
            if(islower(c))
                c-=('a'-'A');

       getline(cin, s0);

        if(islower(s0[0]))
            s0[0]-=('a'-'A');

        for(auto c:s)
            if(s0[0]==c)
                sum++;

        cout << sum;


    }
}