View Compilation Error

0_0_35507490_15704.c: In function 'main':
0_0_35507490_15704.c:6:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i = 2;i<=n*2;i+=2){
   ^
0_0_35507490_15704.c:6:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_35507490_15704.c:17:2: error: 'reurn' undeclared (first use in this function)
  reurn 0;
  ^
0_0_35507490_15704.c:17:2: note: each undeclared identifier is reported only once for each function it appears in
0_0_35507490_15704.c:17:8: error: expected ';' before numeric constant
  reurn 0;
        ^