View Compilation Error

0_0_16236951_22234.c: In function 'main':
0_0_16236951_22234.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i=0;i<n;i++)
  ^
0_0_16236951_22234.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_16236951_22234.c:10:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int j=1;j<=k[i][0];j++)
   ^
0_0_16236951_22234.c:13:11: error: redefinition of 'i'
  for (int i=0;i<n;i++)
           ^
0_0_16236951_22234.c:7:11: note: previous definition of 'i' was here
  for (int i=0;i<n;i++)
           ^
0_0_16236951_22234.c:13:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i=0;i<n;i++)
  ^
0_0_16236951_22234.c:16:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int j=1;j<=k[i][0];j++)
   ^