HJ2题解 | #计算某字符出现次数#

#include <cctype>
#include <iostream>
#include <string>
using namespace std;
int main()
{
    string str1;
    char exp;
    int num;
    getline(cin, str1);//getline是string的函数
    cin.get(exp);
    exp = toupper(exp);
    for(int i=0; i<str1.length();i++)
    {
        str1[i] = toupper(str1[i]);
        if(str1[i] == exp)
        {
            (num)++;
        }
    }  
    cout<<num;
    return 0;
}

HJ2