c语言如何实现二次函数

C语言写二次函数

首先你已经很清楚的说明了你这个程序是用C语言写二次函数的,而当a=0时,就不是二次函数了,应该按照一次函数来进行计算,否则 一个数除以0就没有意义了.~

#include stdio.h

#include stdlib.h

#include math.h

int main()

{

float a,b,c;

printf("input number a=:");

scanf("%f",a);

printf("input number b=:");

scanf("%f",b);

printf("input number c=:");

scanf("%f",c);

if(a==0)

printf("一根:%f\n",c*(-1)/b);

else if(a==0b==0)

printf("无意义！");

else

if(m0)

printf("两根\n");

}

else if(m==0)

printf("无实根\n");

return 0;

C语言怎样设计二次函数,请各位哥哥姐姐帮帮忙,

if(m=0a！=0){

if(m0){

printf("x1=%f\n",x1);

printf("一根\n");

if(a=0 b!=0) printf("根是x=-c/b");

if(a=0b=0) printf("为常函数")；

if(a!=0) printf("无根\n");

system("PAUSE");

return 0; }

c语言解答二次函数

这个简单啊

#includestdio.h

#includemath.h

main()

double a,b,c,w;

printf("请输入三个数（方程的系数）,中间用空格分开\n");

scanf("%lf%lf%lf",a,b,c);

if (w0)printf("方程无解\n");

用c语言画一个2次函数图像

#include?windows.h

LRESULT?CALLBACK?WndProc(HWND,?UINT,?WPARAM,?LPARAM);

int?WINAPI?WinMain(HINSTANCE?hInstance,?HINSTANCE?hPrevInstance,

PSTR?szCmdLine,?int?iCmdShow)

static?TCHAR?szAppName[]=TEXT("二次函数");

HWND??hwnd;

MSG??msg;

WNDCLASS??wndclass;

wndclass.style=CS_HREDRAW|CS_VREDRAW;

wndclass.lpfnWndProc=WndProc;

wndclass.cbClsExtra=0;

wndclass.cbWndExtra=0;

wndclass.hInstance=hInstance;

wndclass.hIcon=LoadIcon(NULL,?IDI_APPLICATION);

wndclass.hCursor=LoadCursor(NULL,?IDC_ARROW);

wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);

wndclass.lpszMenuName=NULL;

wndclass.lpszClassName=szAppName;

if?(!RegisterClass(wndclass))

MessageBox(NULL,?TEXT("Error"),

szAppName,?MB_ICONERROR);

return?0;

hwnd=CreateWindow(szAppName,?TEXT("二次函数"),

WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT,?CW_USEDEFAULT,

NULL,?NULL,?hInstance,?NULL);

ShowWindow(hwnd,?iCmdShow);

UpdateWindow(hwnd);

while?(GetMessage(msg,?NULL,?0,?0))

TranslateMessage(msg);

DispatchMessage(msg);

return?msg.wParam;

LRESULT?CALLBACK?WndProc(HWND?hwnd,?UINT?message,?WPARAM?wParam,?LPARAM?lParam)

static?int?cxClient,?cyClient;

const?static?int?n=1000;

HDC??hdc;

int??i;

PAINTSTRUCT?ps;

POINT??apt[n];

switch?(message)

case?WM_SIZE:

cxClient=LOWORD(lParam);

cyClient=HIWORD(lParam);

case?WM_PAINT:

hdc=BeginPaint(hwnd,?ps);

for?(i=0;?i?n;++i)

Polyline(hdc,?apt,?n);

case?WM_DESTROY:

PostQuitMessage(0);

return?DefWindowProc(hwnd,?message,?wParam,?lParam);

以上就是土嘎嘎小编为大家整理的c语言如何实现二次函数相关主题介绍,如果您觉得小编更新的文章只要能对粉丝们有用,就是我们最大的鼓励和动力,不要忘记讲本站分享给您身边的朋友哦！！