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要求使用C++风格字符串完成。

代码：

#include <iostream>
#include <string.h>
using namespace std;int main()
{string str ;int low = 0, up = 0, num = 0, blank = 0, other = 0;cout << "Please input a string:" << endl;getline(cin,str);for (int i = 0; i < str.size() ; i++) {if(islower(str[i]))low++;else if(isupper(str[i]))up++;else if(str[i] == ' ')blank++;else if(str[i] >= 48 && str[i] <= 57)num++;elseother++;}cout << "low = " << low << endl << "up = " << up << endl << "num = " << num << endl << "blank = " << blank <<endl << "other = " << other << endl;return 0;
}

结果

2>思维导图