Language: C++

#include<iostream>
using namespace std;
int main()
{
    // αの入力
    string α;
    cin >> α;
   
    if(α=A){cout << A << endl;}
  if(α=B){cout << A << endl;}
  if(α=C){cout << A << endl;}
  if(α=D){cout << A << endl;}
  if(α=E){cout << A << endl;}
  if(α=F){cout << A << endl;}
  if(α=G){cout << A << endl;}
  if(α=H){cout << A << endl;}
  if(α=I){cout << A << endl;}
  if(α=J){cout << A << endl;}
  if(α=K){cout << A << endl;}
  if(α=O){cout << A << endl;}
  if(α=P){cout << A << endl;}
  if(α=Q){cout << A << endl;}
  if(α=R){cout << A << endl;}
  if(α=S){cout << A << endl;}
  if(α=T){cout << A << endl;}
  if(α=U){cout << A << endl;}
  if(α=V){cout << A << endl;}
  if(α=W){cout << A << endl;}
  if(α=X){cout << A << endl;}
  if(α=Y){cout << A << endl;}
  if(α=Z){cout << A << endl;}
  	if(α=a){cout << a << endl;}
  if(α=b){cout << a << endl;}
  if(α=c){cout << a << endl;}
  if(α=d){cout << a << endl;}
  if(α=e){cout << a << endl;}
  if(α=f){cout << a << endl;}
  if(α=g){cout << a << endl;}
  if(α=h){cout << a << endl;}
  if(α=i){cout << a << endl;}
  if(α=j){cout << a << endl;}
  if(α=k){cout << a << endl;}
  if(α=l){cout << a << endl;}
  if(α=m){cout << a << endl;}
  if(α=n){cout << a << endl;}
  if(α=o){cout << a << endl;}
  if(α=p){cout << a << endl;}
  if(α=q){cout << a << endl;}
  if(α=r){cout << a << endl;}
  if(α=s){cout << a << endl;}
  if(α=t){cout << a << endl;}
  if(α=u){cout << a << endl;}
  if(α=v){cout << a << endl;}
  if(α=w){cout << a << endl;}
  if(α=x){cout << a << endl;}
  if(α=y){cout << a << endl;}
  if(α=z){cout << a << endl;}
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: 'A' was not declared in this scope
    9 |     if(α=A){cout << A << endl;}
      |          ^
a.cc:10:8: error: 'B' was not declared in this scope
   10 |   if(α=B){cout << A << endl;}
      |        ^
a.cc:10:19: error: 'A' was not declared in this scope
   10 |   if(α=B){cout << A << endl;}
      |                   ^
a.cc:11:8: error: 'C' was not declared in this scope
   11 |   if(α=C){cout << A << endl;}
      |        ^
a.cc:11:19: error: 'A' was not declared in this scope
   11 |   if(α=C){cout << A << endl;}
      |                   ^
a.cc:12:8: error: 'D' was not declared in this scope
   12 |   if(α=D){cout << A << endl;}
      |        ^
a.cc:12:19: error: 'A' was not declared in this scope
   12 |   if(α=D){cout << A << endl;}
      |                   ^
a.cc:13:8: error: 'E' was not declared in this scope
   13 |   if(α=E){cout << A << endl;}
      |        ^
a.cc:13:19: error: 'A' was not declared in this scope
   13 |   if(α=E){cout << A << endl;}
      |                   ^
a.cc:14:8: error: 'F' was not declared in this scope
   14 |   if(α=F){cout << A << endl;}
      |        ^
a.cc:14:19: error: 'A' was not declared in this scope
   14 |   if(α=F){cout << A << endl;}
      |                   ^
a.cc:15:8: error: 'G' was not declared in this scope
   15 |   if(α=G){cout << A << endl;}
      |        ^
a.cc:15:19: error: 'A' was not declared in this scope
   15 |   if(α=G){cout << A << endl;}
      |                   ^
a.cc:16:8: error: 'H' was not declared in this scope
   16 |   if(α=H){cout << A << endl;}
      |        ^
a.cc:16:19: error: 'A' was not declared in this scope
   16 |   if(α=H){cout << A << endl;}
      |                   ^
a.cc:17:8: error: 'I' was not declared in this scope
   17 |   if(α=I){cout << A << endl;}
      |        ^
a.cc:17:19: error: 'A' was not declared in this scope
   17 |   if(α=I){cout << A << endl;}
      |                   ^
a.cc:18:8: error: 'J' was not declared in this scope
   18 |   if(α=J){cout << A << endl;}
      |        ^
a.cc:18:19: error: 'A' was not declared in this scope
   18 |   if(α=J){cout << A << endl;}
      |                   ^
a.cc:19:8: error: 'K' was not declared in this scope
   19 |   if(α=K){cout << A << endl;}
      |        ^
a.cc:19:19: error: 'A' was not declared in this scope
   19 |   if(α=K){cout << A << endl;}
      |                   ^
a.cc:20:8: error: 'O' was not declared in this scope
   20 |   if(α=O){cout << A << endl;}
      |        ^
a.cc:20:19: error: 'A' was not declared in this scope
   20 |   if(α=O){cout << A << endl;}
      |                   ^
a.cc:21:8: error: 'P' was not declared in this scope
   21 |   if(α=P){cout << A << endl;}
      |        ^
a.cc:21:19: error: 'A' was not declared in this scope
   21 |   if(α=P){cout << A << endl;}
      |                   ^
a.cc:22:8: error: 'Q' was not declared in this scope
   22 |   if(α=Q){cout << A << endl;}
      |        ^
a.cc:22:19: error: 'A' was not declared in this scope
   22 |   if(α=Q){cout << A << endl;}
      |                   ^
a.cc:23:8: error: 'R' was not declared in this scope
   23 |   if(α=R){cout << A << endl;}
      |        ^
a.cc:23:19: error: 'A' was not declared in this scope
   23 |   if(α=R){cout << A << endl;}
      |                   ^
a.cc:24:8: error: 'S' was not declared in this scope
   24 |   if(α=S){cout << A << endl;}
      |        ^
a.cc:24:19: error: 'A' was not declared in this scope
   24 |   if(α=S){cout << A << endl;}
      |                   ^
a.cc:25:8: error: 'T' was not declared in this scope
   25 |   if(α=T){cout << A << endl;}
      |        ^
a.cc:25:19: error: 'A' was not declared in this scope
   25 |   if(α=T){cout << A << endl;}
      |                   ^
a.cc:26:8: error: 'U' was not declared in this scope
   26 |   if(α=U){cout << A << endl;}
      |        ^
a.cc:26:19: error: 'A' was not declared in this scope
   26 |   if(α=U){cout << A << endl;}
      |                   ^
a.cc:27:8: error: 'V' was not declared in this scope
   27 |   if(α=V){cout << A << endl;}
      |        ^
a.cc:27:19: error: 'A' was not declared in this scope
   27 |   if(α=V){cout << A << endl;}
      |                   ^
a.cc:28:8: error: 'W' was not declared in this scope
   28 |   if(α=W){cout << A << endl;}
      |        ^
a.cc:28:19: error: 'A' was not declared in this scope
   28 |   if(α=W){cout << A << endl;}
      |                   ^
a.cc:29:8: error: 'X' was not declared in this scope
   29 |   if(α=X){cout << A << endl;}
      |        ^
a.cc:29:19: error: 'A' was not declared in this scope
   29 |   if(α=X){cout << A << endl;}
      |                   ^
a.cc:30:8: error: 'Y' was not declared in this scope
   30 |   if(α=Y){cout << A << endl;}
      |        ^
a.cc:30:19: error: 'A' was not declared in this scope
   30 |   if(α=Y){cout << A << endl;}
      |                   ^
a.cc:31:8: error: 'Z' was not declared in this scope
   31 |   if(α=Z){cout << A << endl;}
      |        ^
a.cc:31:19: error: 'A' was not declared in this scope
   31 |   if(α=Z){cout << A << endl;}
      |                   ^
a.cc:32:14: error: 'a' was not declared in this scope
   32 |         if(α=a){cout << a << endl;}
      |              ^
a.cc:33:8: error: 'b' was not declared in this scope
   33 |   if(α=b){cout << a << endl;}
      |        ^
a.cc:33:19: error: 'a' was not declared in this scope
   33 |   if(α=b){cout << a << endl;}
      |                   ^
a.cc:34:8: error: 'c' was not declared in this scope
   34 |   if(α=c){cout << a << endl;}
      |        ^
a.cc:34:19: error: 'a' was not declared in this scope
   34 |   if(α=c){cout << a << endl;}
      |                   ^
a.cc:35:8: error: 'd' was not declared in this scope
   35 |   if(α=d){cout << a << endl;}
      |        ^
a.cc:35:19: error: 'a' was not declared in this scope
   35 |   if(α=d){cout << a << endl;}
      |                   ^
a.cc:36:8: error: 'e' was not declared in this scope
   36 |   if(α=e){cout << a << endl;}
      |        ^
a.cc:36:19: error: 'a' was not declared in this scope
   36 |   if(α=e){cout << a << endl;}
      |                   ^
a.cc:37:8: error: 'f' was not declared in this scope
   37 |   if(α=f){cout << a << endl;}
      |        ^
a.cc:37:19: error: 'a' was not declared in this scope
   37 |   if(α=f){cout << a << endl;}
      |                   ^
a.cc:38:8: error: 'g' was not declared in this scope
   38 |   if(α=g){cout << a << endl;}
      |        ^
a.cc:38:19: error: 'a' was not declared in this scope
   38 |   if(α=g){cout << a << endl;}
      |                   ^
a.cc:39:8: error: 'h' was not declared in this scope
   39 |   if(α=h){cout << a << endl;}
      |        ^
a.cc:39:19: error: 'a' was not declared in this scope
   39 |   if(α=h){cout << a << endl;}
      |                   ^
a.cc:40:8: error: 'i' was not declared in this scope
   40 |   if(α=i){cout << a << endl;}
      |        ^
a.cc:40:19: error: 'a' was not declared in this scope
   40 |   if(α=i){cout << a << endl;}
      |                   ^
a.cc:41:8: error: 'j' was not declared in this scope
   41 |   if(α=j){cout << a << endl;}
      |        ^
a.cc:41:19: error: 'a' was not declared in this scope
   41 |   if(α=j){cout << a << endl;}
      |                   ^
a.cc:42:8: error: 'k' was not declared in this scope
   42 |   if(α=k){cout << a << endl;}
      |        ^
a.cc:42:19: error: 'a' was not declared in this scope
   42 |   if(α=k){cout << a << endl;}
      |                   ^
a.cc:43:8: error: 'l' was not declared in this scope
   43 |   if(α=l){cout << a << endl;}
      |        ^
a.cc:43:19: error: 'a' was not declared in this scope
   43 |   if(α=l){cout << a << endl;}
      |                   ^
a.cc:44:8: error: 'm' was not declared in this scope; did you mean 'tm'?
   44 |   if(α=m){cout << a << endl;}
      |        ^
      |        tm
a.cc:44:19: error: 'a' was not declared in this scope
   44 |   if(α=m){cout << a << endl;}
      |                   ^
a.cc:45:8: error: 'n' was not declared in this scope
   45 |   if(α=n){cout << a << endl;}
      |        ^
a.cc:45:19: error: 'a' was not declared in this scope
   45 |   if(α=n){cout << a << endl;}
      |                   ^
a.cc:46:8: error: 'o' was not declared in this scope
   46 |   if(α=o){cout << a << endl;}
      |        ^
a.cc:46:19: error: 'a' was not declared in this scope
   46 |   if(α=o){cout << a << endl;}
      |                   ^
a.cc:47:8: error: 'p' was not declared in this scope
   47 |   if(α=p){cout << a << endl;}
      |        ^
a.cc:47:19: error: 'a' was not declared in this scope
   47 |   if(α=p){cout << a << endl;}
      |                   ^
a.cc:48:8: error: 'q' was not declared in this scope
   48 |   if(α=q){cout << a << endl;}
      |        ^
a.cc:48:19: error: 'a' was not declared in this scope
   48 |   if(α=q){cout << a << endl;}
      |                   ^
a.cc:49:8: error: 'r' was not declared in this scope
   49 |   if(α=r){cout << a << endl;}
      |        ^
a.cc:49:19: error: 'a' was not declared in this scope
   49 |   if(α=r){cout << a << endl;}
      |                   ^
a.cc:50:8: error: 's' was not declared in this scope
   50 |   if(α=s){cout << a << endl;}
      |        ^
a.cc:50:19: error: 'a' was not declared in this scope
   50 |   if(α=s){cout << a << endl;}
      |                   ^
a.cc:51:8: error: 't' was not declared in this scope; did you mean 'tm'?
   51 |   if(α=t){cout << a << endl;}
      |        ^
      |        tm
a.cc:51:19: error: 'a' was not declared in this scope
   51 |   if(α=t){cout << a << endl;}
      |                   ^
a.cc:52:8: error: 'u' was not declared in this scope
   52 |   if(α=u){cout << a << endl;}
      |        ^
a.cc:52:19: error: 'a' was not declared in this scope
   52 |   if(α=u){cout << a << endl;}
      |                   ^
a.cc:53:8: error: 'v' was not declared in this scope
   53 |   if(α=v){cout << a << endl;}
      |        ^
a.cc:53:19: error: 'a' was not declared in this scope
   53 |   if(α=v){cout << a << endl;}
      |                   ^
a.cc:54: