[编程入门]字符串分类统计c++

解题思路:

注意事项:

参考代码:

#include<iostream>

#include<string>

using namespace std;

int main()

{

string  x;

getline(cin, x);

int a[4] = { 0 }, n = 0, m = x.size();

while (n<m)

{

if (x.at(n) >= 'a' && x.at(n) <= 'z' || x.at(n) >= 'A' && x.at(n) <= 'Z')

a[0]++;

else if (x.at(n) >= '0' && x.at(n) <= '9')

a[1]++;

else if (x.at(n) == ' ')

a[2]++;

else

a[3]++;

n++;

}

cout << a[0] << " " << a[1] << " " << a[2] << " " << a[3];

return 0;

}