View Compilation Error

0_0_22361203_4934.c: In function 'main':
0_0_22361203_4934.c:1:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
 main(k){for(char*p="@\20_\23K\25`\30A\32b1";k=*p++;printf("%d%d / %d%d = %d / %d\n",*p++,k/10,k/10,k,*p,k));}
         ^
0_0_22361203_4934.c:1:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code