#include?<stdio.h>
float?cost;
extern?float?money(float?s)
{
????if(s?<=?3)
????{
????return?cost?=?13;???
????}
????else
????{
????return??cost?=?money(s-1)?+?2.3;
????}
}
int?main()
{
????float?rmb?=?money(12);//這里要放在main函數(shù)里面
????float?R=?rmb?*?1.2;
????printf("每天打車費(fèi)用%f",R);
????return?0;
}