View Compilation Error

0_0_19234788_6340.c: In function 'main':
0_0_19234788_6340.c:16:6: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
      for(int i=0;i<n;i++)
      ^
0_0_19234788_6340.c:16:6: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_19234788_6340.c:21:14: error: redefinition of 'i'
      for(int i=0;i<n;i++)
              ^
0_0_19234788_6340.c:16:14: note: previous definition of 'i' was here
      for(int i=0;i<n;i++)
              ^
0_0_19234788_6340.c:21:6: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
      for(int i=0;i<n;i++)
      ^