View Compilation Error

0_0_13096935_12673.c: In function 'main':
0_0_13096935_12673.c:9:13: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
             for ( int i = 0; i != T; ++ i )
             ^
0_0_13096935_12673.c:9:13: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code