题解 | #字符数量#

#include <bits/stdc++.h> using namespace std; char a[100001]; int b[26]; int main() { for( int i = 0 ; i < 100001 ; i ++ )
{ cin >> a[i]; b[(int)a[i]] ++; }

for( int i = 97 ; i <= 123 ; i ++ ) 
{
    if(b[i] == 0) continue;
    else
    cout << (char)i << ':' << b[i] << endl; 
}
return 0;

}