View Compilation Error

0_0_23488522_6465.c: In function 'main':
0_0_23488522_6465.c:7:7: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
       for(int i =2;i<=n;i++)
       ^
0_0_23488522_6465.c:7:7: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code