题解 | #字符个数统计#

#include <iostream>
#include <string>

using namespace std;

int main()
{
    string str;
    int iNum = 0;
    cin >> str;
    char cTmp[1024];
    bool flag = false;
    int length = str.length();
    for(int i = 0; i < length; i++)
    {
        if(str[i] - NULL >= 0 && str[i] - NULL <= 127)
        {
            for(int j = 0; j<iNum; j++)
            {
                if(str[i] == cTmp[j])
                {
                    flag = true;
                }
            }

            if(flag == false && str[i] - NULL != 10)
            {
                cTmp[iNum] = str[i];
                iNum ++;
            }
            else
            {
                flag = false;
            }
        }
    }
    cout << iNum <<endl;
    return 0;
}