有没有大佬能解决一下

#include <stdio.h>

float cost(int distance int over)

double price=2.3;

double night;

if(distance<=3)

{

    night= 14;

}

else if(over<=23&&over>=5){

    night=(distance-3)*price+14;

    printf("白天车费为%f\n",night);

}

else{

    night=(distance-3)*(price*1.2)+14;

     printf("白天车费为%f\n",night);

}

return night;

int main()

{   

    double allcost = 69.4;

    printf("小明每天打车是",allcost);

    return 0;

}