使用海伦公式求三角形面积C++

#include<iostream>
#include<windows.h>
#include<conio.h>
#include<algorithm>
#include<cmath>
#include<vector>
#include<stdio.h>
#include<iostream>
#include<string>
#include<cstring>
#include<windows.h>
#include<conio.h>
#include<cstdlib>
#include<ctime>
#include<fstream>
using namespace std;
void gotoxy(int y,int x) 
{
    COORD  coord;     
    coord.X=x;         
    coord.Y=y;
    HANDLE a=GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorPosition(a,coord);    
}
void bukakeqingping(){
    gotoxy(0,0);
    for (int i = 0; i < 100; i++) {
        cout << "                                                                                                        " << endl;
    }
    gotoxy(0,0);
}
void color(int a)//打印颜色
{
/*亮白*/    if(a==0) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE);
/*蓝色*/    if(a==1) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_GREEN|FOREGROUND_BLUE);
/*绿色*/    if(a==2) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_GREEN);
/*紫色*/    if(a==3) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_RED|FOREGROUND_BLUE);
/*红色*/    if(a==4) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_RED);
/*黄色*/    if(a==5) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_RED|FOREGROUND_GREEN);
/*深蓝色*/    if(a==6) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_INTENSITY|FOREGROUND_BLUE);
/*土黄色or金黄色*/    if(a==7) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_RED|FOREGROUND_GREEN);
/*灰色接近白*/    if(a==8) SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FOREGROUND_RED|FOREGROUND_GREEN|FOREGROUND_BLUE);
}
long long numberaio(string n){
    for (int i = 0; i < 100000; i++) {
        if(n[i]=='\0')
        {
            return i;
        }
    }
}
void coutAIO(string b,int truefalse0 = 1,bool truefalse1 = 1,bool truefalse3 = 0){
    int i=0,s=0;
    long long a=numberaio(b);
    while(a!=0){
        s=rand()%9;
        if(a!=0&&s==0)
        {
            color(0);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==1)
        {
            color(1);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==2)
        {
            color(2);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==3)
        {
            color(3);
            cout << b[i];
            a--;
            i++;
            if(truefalse0!=false){
                Sleep(20);
            }
        }
        if(a!=0&&s==4)
        {
            color(4);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==5)
        {
            color(5);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==6)
        {
            color(6);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==7)
        {
            color(7);
            cout << b[i];
            a--;
            i++;
        }
        if(a!=0&&s==8)
        {
            color(8);
            cout << b[i];
            a--;
            i++;
        }
        if(truefalse0 ==1){
            Sleep(10);
        }
        if(truefalse0 ==2){
            Sleep(20);
        }
        if(truefalse0 ==3){
            Sleep(40);
        }
        if(truefalse0 ==4){
            Sleep(100);
        }
        if(truefalse0 ==5){
            Sleep(300);
        }
        if(truefalse0 ==6){
            Sleep(1000);
        }
        if(truefalse0 ==100){
            Sleep(1);
        }
    }
    if(truefalse1!=false){
        cout << endl;
    }
    if(truefalse3!=false){
        getch();
        bukakeqingping();
    }
}
void start(int n)
{
    int g=n;
	system("cls");
    Sleep(1000);
    gotoxy(0,0);
	for (int i=1;i<=n; i++)
	{
		for (int i=1;i<=g; i++)
	    {
		    coutAIO("██┃",0,0);
	    }
	    cout<<endl;
	}
	coutAIO("华丽！！",4);
    Sleep(5000);
    system("cls");
    Sleep(5000);
    //ksjm();
    //start();
}
void sjxjs()
{
	color(6);
	gotoxy(20,40);
	coutAIO("     三    角    形    面    积    计    算 ",3);
	gotoxy(22,40);
	coutAIO("    sān   jiǎo  xíng  miàn   jí    jì   suàn",3);
	Sleep(2000);
	gotoxy(24,40);
	coutAIO("                      H E P P Y             ",3);
	Sleep(200);
	gotoxy(26,40);
	coutAIO("  　作者：            i m X 2 G             ",3);
	Sleep(1000);
	color(3);
	gotoxy(28,45);
	coutAIO("       imX2G出品，必是精品！        ",3);
	Sleep(2000);
	color(2);
	system("cls");
	start(60);
	gotoxy(0,60);
	system("cls");
	bool xii=true;
while(xii)
{
	cout<<"\t\t\t\t\t\tv.1.0.0"; 
	gotoxy(0,0);
	printf("    ＷＥＬＣＯＭＥ                                                        ＷＥＬＣＯＭＥ    \n");
	printf("┌──────────────────────────────────────────────────────────────────────────────────────────┐\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│                                                                                          │\n");
	printf("│卍                                                                                      卐│\n");
	printf("│卍卍                                                                                  卐卐│\n");
	printf("│卍卍卍                                                                              卐卐卐│\n");
	printf("│卍卍卍卍                                                                          卐卐卐卐│\n");
	printf("└──────────────────────────────────────────────────────────────────────────────────────────┘\n");
	double a,b,c,hcy,ans;
	gotoxy(2,2);
	coutAIO("这是一个三角面积计算器，请输入第一、二、三条边：");
	gotoxy(3,2);
	cin >> a;
	gotoxy(4,2);
	cin >> b;
	gotoxy(5,2);
	cin >> c;
	gotoxy(6,2);
	if(a+b<=c||a+c<=b||b+c<=a||a<0||b<0||c<0){
	    bukakeqingping();
	    color(4);
	    cout<<"这个图形不符合三角形的成立条件！！！";
	    Sleep(3000);
	    bukakeqingping();
	    goto flag;
	}
	hcy=(a+b+c)/2;
	ans=sqrt(hcy*(hcy-a)*(hcy-b)*(hcy-c));
	coutAIO("这个三角形的面积是：");
	gotoxy(6,8);
	cout << ans;
	flag:
	gotoxy(7,2);
	coutAIO("输入0退出，输入1继续");
	gotoxy(6,18);
	cin >> xii;
	bukakeqingping();
}
}
void full_screen()
{   
    HWND hwnd = GetForegroundWindow();
    int cx = GetSystemMetrics(SM_CXSCREEN);            /* 屏幕宽度 像素 */
    int cy = GetSystemMetrics(SM_CYSCREEN);            /* 屏幕高度 像素 */
 
    LONG l_WinStyle = GetWindowLong(hwnd,GWL_STYLE);   /* 获取窗口信息 */
    /* 设置窗口信息 最大化 取消标题栏及边框 */
    SetWindowLong(hwnd,GWL_STYLE,( l_WinStyle |WS_MAXIMIZE| WS_POPUP) & ~WS_CAPTION & ~WS_THICKFRAME & ~WS_BORDER);//  
    SetWindowPos(hwnd, HWND_TOP, 0, 0, cx, cy, 0);
}
int main()
{
    full_screen();
    sjxjs();
    gotoxy(27,2);
    getch();
    exit(0);
}