Language: C++

#include <bits/stdc++.h>
 using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define kuso(a,b) if(s==a){cout<<b<<endl;}
 int main(){
  string s;
   cin>>s;
  kuso(a,b);
    kuso(b,c);
 kuso(c,d);
   kuso(d,e);
   kuso(a,b);
   kuso(a,b);
   kuso(a,b);
   kuso(a,b);
   kuso(a,b);
   kuso(a,b);
   kuso(a,b);
   kuso(a,b);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: 'a' was not declared in this scope
    8 |   kuso(a,b);
      |        ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:8:10: error: 'b' was not declared in this scope
    8 |   kuso(a,b);
      |          ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:9:10: error: 'b' was not declared in this scope
    9 |     kuso(b,c);
      |          ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:9:12: error: 'c' was not declared in this scope
    9 |     kuso(b,c);
      |            ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:10:7: error: 'c' was not declared in this scope
   10 |  kuso(c,d);
      |       ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:10:9: error: 'd' was not declared in this scope
   10 |  kuso(c,d);
      |         ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:11:9: error: 'd' was not declared in this scope
   11 |    kuso(d,e);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:11:11: error: 'e' was not declared in this scope
   11 |    kuso(d,e);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:12:9: error: 'a' was not declared in this scope
   12 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:12:11: error: 'b' was not declared in this scope
   12 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:13:9: error: 'a' was not declared in this scope
   13 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:13:11: error: 'b' was not declared in this scope
   13 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:14:9: error: 'a' was not declared in this scope
   14 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:14:11: error: 'b' was not declared in this scope
   14 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:15:9: error: 'a' was not declared in this scope
   15 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:15:11: error: 'b' was not declared in this scope
   15 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:16:9: error: 'a' was not declared in this scope
   16 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:16:11: error: 'b' was not declared in this scope
   16 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:17:9: error: 'a' was not declared in this scope
   17 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:17:11: error: 'b' was not declared in this scope
   17 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:18:9: error: 'a' was not declared in this scope
   18 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:18:11: error: 'b' was not declared in this scope
   18 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^
a.cc:19:9: error: 'a' was not declared in this scope
   19 |    kuso(a,b);
      |         ^
a.cc:4:25: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                         ^
a.cc:19:11: error: 'b' was not declared in this scope
   19 |    kuso(a,b);
      |           ^
a.cc:4:34: note: in definition of macro 'kuso'
    4 | #define kuso(a,b) if(s==a){cout<<b<<endl;}
      |                                  ^