请问哪里有错????
#include <stdio.h>
int distance(int n)
int time(int t)
{
float cost;
float sum;
if( t>5 && t<=23)
{
cost=2.3*(n-3)+13+1;
sum=2 cost;
return sum;
}
else
{
cost=(2.3*(n-3)+13+1)*1.2;
sum=2 cost;
return sum;
}
}
int main()
{
distance(12);
time(t>=9 && t<=18);
printf("小明每次的打车费用是%f元钱\n",cost);
printf("小明每天的打车费用是%f元钱\n",sum);
return 0;
}