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View Compilation Error

0_0_13900652_2764.c:3:1: error: expected identifier or '(' before '/' token
 //problem 2553
 ^
0_0_13900652_2764.c: In function 'main':
0_0_13900652_2764.c:13:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i =1;i<11;i++)
  ^
0_0_13900652_2764.c:13:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_13900652_2764.c: In function 'dfs':
0_0_13900652_2764.c:27:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=1;i<=N; i++)
  ^
0_0_13900652_2764.c:29:3: error: 'chess' undeclared (first use in this function)
   chess[columNO] = i;
   ^
0_0_13900652_2764.c:29:3: note: each undeclared identifier is reported only once for each function it appears in
0_0_13900652_2764.c: In function 'canPosite':
0_0_13900652_2764.c:40:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i = 1;i< columNO ;i++)
  ^
0_0_13900652_2764.c:42:6: error: 'chess' undeclared (first use in this function)
   if(chess[i] == chess[columNO] || abs(chess[i] - chess[columNO]) == (columNO - i))
      ^


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