MAHOA C++

#include <bits/stdc++.h>
using namespace std;

string s;

void nhap()
{
    getline(cin,s);
}

void giai()
{
    char c;    
    for(int i=0;i<s.length();i++)
    {
        if(('0'<=s[i])&&(s[i]<='9'))
            c = char(int(s[i]+48));
        else
            c= toupper(s[i]);
        cout <<char(c);
    }
}

int main()
{
    freopen("mahoa.inp","r",stdin);
    freopen("mahoa.out","w",stdout);
    nhap();
    giai();
}