2024.1.24 C++&QT 作业

思维导图

练习题

1.提示并输入一个字符串，统计该字符中大写、小写字母个数、数字个数、空格个数以及其他字符个数

#include 
#include 
#include 
using namespace std;

int main()
{
    string str;
    cout << "请输入字符串:";
    getline(cin,str);
    int i=0;
    int lower=0,upper=0,other=0,number=0,space=0;
    while(str[i]!='\0')
    {
        if(str[i]>='a' && str[i]<='z')
        {
            lower++;
        }else if(str[i]>='Z' && str[i]<='Z')
        {
            upper++;
        }else if(str[i]>='0' && str[i]<='9')
        {
            number++;
        }else if(str[i]==' ')
        {
            space++;
        }else{
            other++;
        }
        i++;
    }
    cout << "小写字母：" << lower << endl;
    cout << "大写字母：" << upper << endl;
    cout << "数字：" << number << endl;
    cout << "空格：" << space << endl;
    cout << "其他字符：" << other << endl;
    return 0;
}