View Compilation Error

0_0_36390037_27938.c: In function 'prime':
0_0_36390037_27938.c:7:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i=2;i<=n/2;i++){
  ^
0_0_36390037_27938.c:7:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_36390037_27938.c: In function 'main':
0_0_36390037_27938.c:32:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=2;i<=t/2;i++){
   ^
0_0_36390037_27938.c:43:11: error: redefinition of 'i'
   for(int i=0;i<n;i++){
           ^
0_0_36390037_27938.c:32:11: note: previous definition of 'i' was here
   for(int i=2;i<=t/2;i++){
           ^
0_0_36390037_27938.c:43:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<n;i++){
   ^