新手*_* 用c語言寫壹個算正方形面積和周長的程序

int?main(void)

{

float?side?=?0.0f;

float?circumference;?

float?area;

printf("Input?the?side?of?the?table:");

scanf("%f",?&side);

circumference?=?4.0f?*?side;

area?=?side?*?side;

printf("\nThe?circumference?is?%.2f",?circumference);

printf("\nThe?area?is?%.2f\n",?area);

return?0;

}

忘記聲明變量，還有拼寫錯誤