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加油，
別輸給家裏蹲廢材...
代碼:
#include <iostream.h>
#include <math.h>

float calculate_Sx(float Vinit, float degree, float timeSlice);
float calculate_Sy(float Vinit, float degree, float Height,float timeSlice);
void  receiveInputData(float &Vinit,float &height, float &degree);
float G=9.8;

struct ObjectInfo // 物體的時間，座標 
{
       float currentTime;
       float x;
       float y;
};
      
void receiveInputData(float &Vinit,float &height,float &degree)
{
     cout<<"拋體運動\n" ;
     cout<<"請輸入初始速度(以浮點數或整數)：";
     cin>>Vinit;
     cout<<"你輸入的初始速度為："<<Vinit<<endl;
     cout<<"請輸入初始高度(以浮點數或整數)：";
     cin>>height;
     cout<<"你輸入的初始高度為："<<height<<endl;
     cout<<"請輸入拋體角度(以浮點數或整數)(單位：度)：";
     cin>>degree;
     cout<<"你輸入的拋體角度為："<<degree<<endl;     
 }
 
float calculate_Sx(float Vinit, float degree, float time)
{
      float Sx=0;
      float radian=0;

      radian = (3.14*degree)/180.0;
      Sx = Vinit*cos(radian)*time;

      return Sx;
}

float calculate_Sy(float Vinit, float degree, float height,float time)
{
      float Sy=0;
      float radian=0;
      
      radian = (3.14*degree)/180.0;
      Sy = height + Vinit*sin(radian)*time - 0.5*G*pow(time,2.0);
      
      if(Sy <= 0) return 0;
      
      return Sy;
}

bool isItOnAir(float currentSy)
{
     if (currentSy <= 0) 
     {
     return false;
     } 
     else
     {
     return true;
     }
}

float onAirTime(float Vinit, float degree, float height,float timeSlice)
{
      float elapseTime=0;
      float Sy=0;

     do
     {
      elapseTime = elapseTime+timeSlice;
      Sy = calculate_Sy(Vinit,degree,height,elapseTime); 
      }
      while(isItOnAir(Sy)); // 或 while(Sy > 0) ;

      return elapseTime;
}


int main(void)
{
    float Sx=0;
    float Sy=0;
    float time=0;
    float degree=0;
    float Vinitial=0;
    float height=0;
    float timeSlice = 0.1;
    float currentTime=0;
    float elapseTime=0;
    
    int arraySize=0;
    int index=0;
    
    receiveInputData(Vinitial,height,degree); // 輸入介面 
    
    elapseTime = onAirTime(Vinitial,degree,height,timeSlice); // 滯空時間 
    elapseTime = elapseTime + 3; //落地持續3秒運動 
     
    arraySize = (int)(elapseTime/timeSlice);

    ObjectInfo *objectInfoArray;
    
    // 初始化運動物體的儲存資訊 ，配置記憶體 
    objectInfoArray = (ObjectInfo *)malloc(arraySize*sizeof(ObjectInfo));
  
    do
    {
      currentTime = currentTime+timeSlice;
      Sx = calculate_Sx(Vinitial,degree,currentTime);
      Sy = calculate_Sy(Vinitial,degree,height,currentTime); 
      objectInfoArray[index].currentTime = currentTime;
      objectInfoArray[index].x = Sx;
      objectInfoArray[index].y = Sy;
      index++;
    }
    while(isItOnAir(Sy)); //或 while(Sy > 0);
    
    // continue move 3 seconds
    float onGroundTime = currentTime;  
    do
    {
     currentTime = currentTime+timeSlice;
     Sx = calculate_Sx(Vinitial,degree,currentTime);
     Sy = calculate_Sy(Vinitial,degree,height,currentTime); 
     objectInfoArray[index].currentTime = currentTime;
     objectInfoArray[index].x = Sx;
     objectInfoArray[index].y = Sy;
     index++;     
    }while((onGroundTime+3) >= currentTime);
    
    //輸出介面 
    for(int i=0;i<arraySize;i++)
    cout<<i<<",time="<<objectInfoArray[i].currentTime<<",(x="<<objectInfoArray[i].x<<",y="<<objectInfoArray[i].y<<")"<<endl;

   return 0;  
}
的我...唉...