View Compilation Error

0_0_32764194_3690.c: In function 'main':
0_0_32764194_3690.c:8:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i = 3; i < 55; i++) x[i] = x[i - 1] +x[i - 2];
  ^
0_0_32764194_3690.c:8:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code