View Compilation Error

0_0_38338346_24892.c: In function 'main':
0_0_38338346_24892.c:8:6: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
      for(int i = 1;i<=n;i++)
      ^
0_0_38338346_24892.c:8:6: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_38338346_24892.c:11:11: error: redefinition of 'i'
   for(int i = 1;i<= n;i++){
           ^
0_0_38338346_24892.c:8:14: note: previous definition of 'i' was here
      for(int i = 1;i<=n;i++)
              ^
0_0_38338346_24892.c:11:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i = 1;i<= n;i++){
   ^