今日任务：

代码：

#include <iostream>

using namespace std;

int main()
{
    /*
     * 输入字符串统计大写、小写、数字、空格以及其他字符的个数
     *
    */
    string s;
    cout << "请输入一个字符串" << endl;
    //cin >> s;
    getline(cin,s);
    int small=0,big=0,number=0,space=0,other=0;
    for(int i=0;i<(int)s.size();i++){
        cout << s[i] <<endl;
        if('a'<=s[i]&& s[i]<='z'){
            small++;
        }else if('A'<=s[i]&& s[i]<='Z'){
            big++;
        }else if(0<=s[i]&& s[i]<=9){
            number++;
        }else if(s[i]==' '){
            space++;
        }else{
            other++;
        }
    }
    cout << "small=" << small << " big=" << big << " number=" << number << "space" << space<< " other=" << other <<endl;
    return 0;
}

运行结果：

今日思维导图