#include<iostream>
using namespace std;
int main(){
     char n;
     cin>>n;
     cout<<(int) n;
     return 0;
}

求赞，谢谢！

#include<bits/stdc++.h> using namespace std; int main() { char c; cin>>c; cout<<int(c); }

#include<bits/stdc++.h>
using namespace std;
int main(){
   char a;
   cin>>a;
   cout<<(int(a));
   return 0;
}