1> 思维导图
2> 试编程
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)
#include <iostream>using namespace std;int main()
{int lower_case=0,capital=0,black=0,number=0;string str;cout << "请输入一个字符串" << endl;getline(cin,str);string::iterator iter;for(iter = str.begin();iter != str.end();iter++){if(*iter >= 'A' && *iter <= 'Z'){capital++;}if(*iter >= 'a' && *iter <= 'z'){lower_case++;}if(*iter >= '0' && *iter <= '9'){number++;}if(*iter == ' '){black++;}}cout << "大写字母的个数为:" << capital << endl;cout << "小写字母的个数为:" << lower_case << endl;cout << "数字的个数为:" << number << endl;cout << "空格的个数为:" << black << endl;return 0;
}
