Language: C++

#include <stdio.h>
main(){
??
????int a,b,c;
??
????scanf("%d%d%d",&a,&b,&c);
??
????if(a < b?? && b < c){
 printf("Yes\n");
}
????else{
 printf("No\n");
??}
????return 0;
}

Compiler output:
a.cc:2:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    2 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:3:1: error: expected primary-expression before '?' token
    3 | ??
      | ^
a.cc:3:2: error: expected primary-expression before '?' token
    3 | ??
      |  ^
a.cc:4:1: error: expected primary-expression before '?' token
    4 | ????int a,b,c;
      | ^
a.cc:4:2: error: expected primary-expression before '?' token
    4 | ????int a,b,c;
      |  ^
a.cc:4:3: error: expected primary-expression before '?' token
    4 | ????int a,b,c;
      |   ^
a.cc:4:4: error: expected primary-expression before '?' token
    4 | ????int a,b,c;
      |    ^
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:4:5: error: expected ':' before 'int'
    4 | ????int a,b,c;
      |     ^~~
      |     :
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:4:5: error: expected ':' before 'int'
    4 | ????int a,b,c;
      |     ^~~
      |     :
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:4:5: error: expected ':' before 'int'
    4 | ????int a,b,c;
      |     ^~~
      |     :
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:4:5: error: expected ':' before 'int'
    4 | ????int a,b,c;
      |     ^~~
      |     :
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:4:5: error: expected ':' before 'int'
    4 | ????int a,b,c;
      |     ^~~
      |     :
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:4:5: error: expected ':' before 'int'
    4 | ????int a,b,c;
      |     ^~~
      |     :
a.cc:4:5: error: expected primary-expression before 'int'
    4 | ????int a,b,c;
      |     ^~~
a.cc:5:1: error: expected primary-expression before '?' token
    5 | ??
      | ^
a.cc:5:2: error: expected primary-expression before '?' token
    5 | ??
      |  ^
a.cc:6:1: error: expected primary-expression before '?' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      | ^
a.cc:6:2: error: expected primary-expression before '?' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |  ^
a.cc:6:3: error: expected primary-expression before '?' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |   ^
a.cc:6:4: error: expected primary-expression before '?' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |    ^
a.cc:6:21: error: 'a' was not declared in this scope
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                     ^
a.cc:6:24: error: 'b' was not declared in this scope
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                        ^
a.cc:6:27: error: 'c' was not declared in this scope
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                           ^
a.cc:6:29: error: expected ':' before ';' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                             ^
      |                             :
a.cc:6:29: error: expected primary-expression before ';' token
a.cc:6:29: error: expected ':' before ';' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                             ^
      |                             :
a.cc:6:29: error: expected primary-expression before ';' token
a.cc:6:29: error: expected ':' before ';' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                             ^
      |                             :
a.cc:6:29: error: expected primary-expression before ';' token
a.cc:6:29: error: expected ':' before ';' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                             ^
      |                             :
a.cc:6:29: error: expected primary-expression before ';' token
a.cc:6:29: error: expected ':' before ';' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                             ^
      |                             :
a.cc:6:29: error: expected primary-expression before ';' token
a.cc:6:29: error: expected ':' before ';' token
    6 | ????scanf("%d%d%d",&a,&b,&c);
      |                             ^
      |                             :
a.cc:6:29: error: expected primary-expression before ';' token
a.cc:7:1: error: expected primary-expression before '?' token
    7 | ??
      | ^
a.cc:7:2: error: expected primary-expression before '?' token
    7 | ??
      |  ^
a.cc:8:1: error: expected primary-expression before '?' token
    8 | ????if(a < b?? && b < c){
      | ^
a.cc:8:2: error: expected primary-expression before '?' token
    8 | ????if(a < b?? && b < c){
      |  ^
a.cc:8:3: error: expected primary-expression before '?' token
    8 | ????if(a < b?? && b < c){
      |   ^
a.cc:8:4: error: expected primary-expression before '?' token
    8 | ????if(a < b?? && b < c){
      |    ^
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:8:5: error: expected ':' before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
      |     :
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:8:5: error: expected ':' before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
      |     :
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:8:5: error: expected ':' before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
      |     :
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:8:5: error: expected ':' before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
      |     :
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:8:5: error: expected ':' before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
      |     :
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:8:5: error: expected ':' before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
      |     :
a.cc:8:5: error: expected primary-expression before 'if'
    8 | ????if(a < b?? && b < c){
      |     ^~
a.cc:11:1: error: expected primary-expression before '?' token
   11 | ????else{
      | ^
a.cc:11:2: error: expected primary-expression before '?' token
   11 | ????else{
      |  ^
a.cc:11:3: error: expected primary-expression before '?' token
   11 | ????else{
      |   ^
a.cc:11:4: error: expected primary-expression before '?' token
   11 | ????else{
      |    ^
a.cc:11:5: error: expected primary-expression before 'else'
   11 | ????else{
      |     ^~~~
a.cc:11:5: error: expected ':' before 'else'
   11 | ????else{
      |     ^~~~
      |     :
a.cc:11:5: error: expected primary-expression before 'else'
   11 | ????else{
      |     ^~~~
a.cc:11:5: error: expected ':' before 'else'
   11 | ????else{
      |     ^~~~
      |     :
a.cc:11:5: error: expected primary-expression before 'else'
   11 | ????else{
      |     ^~~~
a.cc:11:5: error: expected ':' before 'else'
   11 | ????else{
      |     ^~~~
      |     :
a.cc:11:5: error: expected primary-expression before 'else'
   11 | ????else{
      |     ^~~~
a.cc:11:5: error: expected ':' before 'else'
   11 | ????else{
      |     ^~~~
      |     :
a.cc:11:5: error: expected primary-expression before 'else'
   11 | ????else{
      |     ^~~~
a.cc:14:1: error: expected primary-expression before '?' token
   14 | ????return 0;
      | ^
a.cc:14:2: error: expected primary-expression before '?' token
   14 | ????return 0;
      |  ^
a.cc:14:3: error: expected primary-expression before '?' token
   14 | ????return 0;
      |   ^
a.cc:14:4: error: expected primary-expression before '?' token
   14 | ????return 0;
      |    ^
a.cc:14:5: error: expected primary-expression before 'return'
   14 | ????return 0;
      |     ^~~~~~
a.cc:14:5: error: expected ':' before 'return'
   14 | ????return 0;
      |     ^~~~~~
      |     :
a.cc:14:5: error: expected primary-expression before 'return'
   14 | ????return 0;
      |     ^~~~~~
a.cc:14:5: error: expected ':' before 'return'
   14 | ????return 0;
      |     ^~~~~~
      |     :
a.cc:14:5: error: expected primary-expression before 'return'
   14 | ????return 0;
      |     ^~~~~~
a.cc:14:5: error: expected ':' before 'return'
   14 | ????return 0;
      |     ^~~~~~
      |     :
a.cc:14:5: error: expected primary-expression before 'return'
   14 | ????return 0;
      |     ^~~~~~
a.cc:14:5: error: expected ':' before 'return'
   14 | ????return 0;
      |     ^~~~~~
      |     :
a.cc:14:5: error: expected primary-expression before 'return'
   14 | ????return 0;
      |     ^~~~~~