View Compilation Error

0_0_24643918_18838.c:1:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
 include <stdio.h>
         ^
0_0_24643918_18838.c: In function 'minn':
0_0_24643918_18838.c:8:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for (int i=5;t;i--)
  ^
0_0_24643918_18838.c:8:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_24643918_18838.c:10:8: error: 'W' undeclared (first use in this function)
   s+=t/W[i];
        ^
0_0_24643918_18838.c:10:8: note: each undeclared identifier is reported only once for each function it appears in