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View Compilation Error

0_0_18399350_18337.c:2:1: error: unknown type name 'using'
 using namespace std;
 ^
0_0_18399350_18337.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
 using namespace std;
                 ^
0_0_18399350_18337.c:7:1: error: unknown type name 'bool'
 bool used[120][120];
 ^
0_0_18399350_18337.c: In function 'Init':
0_0_18399350_18337.c:22:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i=1;i<=n;i++)
  ^
0_0_18399350_18337.c:22:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_18399350_18337.c:24:11: error: redefinition of 'i'
  for (int i=0;i<=n+1;i++)
           ^
0_0_18399350_18337.c:22:11: note: previous definition of 'i' was here
  for (int i=1;i<=n;i++)
           ^
0_0_18399350_18337.c:24:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i=0;i<=n+1;i++)
  ^
0_0_18399350_18337.c:25:7: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
       for (int j=0;j<=m+1;j++)
       ^
0_0_18399350_18337.c: In function 'bfs':
0_0_18399350_18337.c:58:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int i=1;i<=4;i++)
     ^
0_0_18399350_18337.c: In function 'main':
0_0_18399350_18337.c:110:5: error: expected expression before '/' token
     //printf ("1\n");
     ^


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