View Compilation Error

0_0_36770948_7005.c: In function 'main':
0_0_36770948_7005.c:9:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(double i = 0.0 ; i <= 9 ; i++)
  ^
0_0_36770948_7005.c:9:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_36770948_7005.c: In function 'pfun':
0_0_36770948_7005.c:27:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(double j = 1.0; j <= x ; j++)
  ^
0_0_36770948_7005.c: In function 'fac':
0_0_36770948_7005.c:37:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int k = 1 ; k <=x ; k++)
  ^