Language: C++

#include<stdio.h>
int main() {
??????int H, W, i, j;
??????while(1){
	scanf_s("%d %d", &H, &W);
	if (H == 0&&W == 0) {
	??????break;
	}
	for (i = 0; i < H; i++) {
	??????for (j = 0; j < W; j++) {
		printf("#");
	??????}
	??????printf("\n");
	}
??????}
??????return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:3:1: error: expected primary-expression before '?' token
    3 | ??????int H, W, i, j;
      | ^
a.cc:3:2: error: expected primary-expression before '?' token
    3 | ??????int H, W, i, j;
      |  ^
a.cc:3:3: error: expected primary-expression before '?' token
    3 | ??????int H, W, i, j;
      |   ^
a.cc:3:4: error: expected primary-expression before '?' token
    3 | ??????int H, W, i, j;
      |    ^
a.cc:3:5: error: expected primary-expression before '?' token
    3 | ??????int H, W, i, j;
      |     ^
a.cc:3:6: error: expected primary-expression before '?' token
    3 | ??????int H, W, i, j;
      |      ^
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:3:7: error: expected ':' before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
      |       :
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:3:7: error: expected ':' before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
      |       :
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:3:7: error: expected ':' before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
      |       :
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:3:7: error: expected ':' before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
      |       :
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:3:7: error: expected ':' before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
      |       :
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:3:7: error: expected ':' before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
      |       :
a.cc:3:7: error: expected primary-expression before 'int'
    3 | ??????int H, W, i, j;
      |       ^~~
a.cc:4:1: error: expected primary-expression before '?' token
    4 | ??????while(1){
      | ^
a.cc:4:2: error: expected primary-expression before '?' token
    4 | ??????while(1){
      |  ^
a.cc:4:3: error: expected primary-expression before '?' token
    4 | ??????while(1){
      |   ^
a.cc:4:4: error: expected primary-expression before '?' token
    4 | ??????while(1){
      |    ^
a.cc:4:5: error: expected primary-expression before '?' token
    4 | ??????while(1){
      |     ^
a.cc:4:6: error: expected primary-expression before '?' token
    4 | ??????while(1){
      |      ^
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:4:7: error: expected ':' before 'while'
    4 | ??????while(1){
      |       ^~~~~
      |       :
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:4:7: error: expected ':' before 'while'
    4 | ??????while(1){
      |       ^~~~~
      |       :
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:4:7: error: expected ':' before 'while'
    4 | ??????while(1){
      |       ^~~~~
      |       :
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:4:7: error: expected ':' before 'while'
    4 | ??????while(1){
      |       ^~~~~
      |       :
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:4:7: error: expected ':' before 'while'
    4 | ??????while(1){
      |       ^~~~~
      |       :
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:4:7: error: expected ':' before 'while'
    4 | ??????while(1){
      |       ^~~~~
      |       :
a.cc:4:7: error: expected primary-expression before 'while'
    4 | ??????while(1){
      |       ^~~~~
a.cc:16:1: error: expected primary-expression before '?' token
   16 | ??????return 0;
      | ^
a.cc:16:2: error: expected primary-expression before '?' token
   16 | ??????return 0;
      |  ^
a.cc:16:3: error: expected primary-expression before '?' token
   16 | ??????return 0;
      |   ^
a.cc:16:4: error: expected primary-expression before '?' token
   16 | ??????return 0;
      |    ^
a.cc:16:5: error: expected primary-expression before '?' token
   16 | ??????return 0;
      |     ^
a.cc:16:6: error: expected primary-expression before '?' token
   16 | ??????return 0;
      |      ^
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~
a.cc:16:7: error: expected ':' before 'return'
   16 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~
a.cc:16:7: error: expected ':' before 'return'
   16 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~
a.cc:16:7: error: expected ':' before 'return'
   16 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~
a.cc:16:7: error: expected ':' before 'return'
   16 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~
a.cc:16:7: error: expected ':' before 'return'
   16 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~
a.cc:16:7: error: expected ':' before 'return'
   16 | ??????return 0;
      |       ^~~~~~
      |       :
a.cc:16:7: error: expected primary-expression before 'return'
   16 | ??????return 0;
      |       ^~~~~~