View Compilation Error

0_0_22023629_22190.cpp:3:30: error: array bound is not an integer constant before ']' token
 int road(int i,int j,char a[w][h+1]){
                              ^
0_0_22023629_22190.cpp:3:35: error: array bound is not an integer constant before ']' token
 int road(int i,int j,char a[w][h+1]){
                                   ^
0_0_22023629_22190.cpp: In function 'int road(...)':
0_0_22023629_22190.cpp:5:5: error: 'a' was not declared in this scope
  if(a[i][j]=='@'){
     ^
0_0_22023629_22190.cpp:5:7: error: 'i' was not declared in this scope
  if(a[i][j]=='@'){
       ^
0_0_22023629_22190.cpp:5:10: error: 'j' was not declared in this scope
  if(a[i][j]=='@'){
          ^