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| #include<stdio.h>
#include<string.h>
#include<conio.h>
#include<stdlib.h>
#include<alloc.h>
#include<math.h>
#include<graphics.h>
#include<dos.h>
#define MAXPOINTS 2000 #define LINEGRAPH
float *x, *y;
int Xe0, Ye0, Xe1, Ye1;
int n; float a, b, ax, ay; char * teststr = "+000000000.000";
void grinit(void)
{
int gd = DETECT,
gm,
errcode;
initgraph(&gd, &gm, "");
errcode = graphresult(); if(errcode!=grOk) {
putsexit(-1); } }
void setlimits(void)
{
Xe0 = textwidth(teststr)+10; Ye0 = 10; Xe1 = getmaxx() - 40
Ye1 = getmaxy() - 2*textheight(teststr)-10;
}
int allocatememory(void)
{
int ret=0; if(coreleft() >= 2*(n+1)*sizeof(float))
{
x=(float*)calloc(n+1,sizeof(float)); y=(float*)calloc(n+1,sizeof(float));
ret = 1; } return ret; }
void freememory(void)
{
free(x);
free(y);
}
float myfunc(float x)
{
float y;
y = sin(x/2)*x;
return y; }
void fillarray(void)
dt = (b-a)/(n-1); for(t=a,i=0;i<n;i++,t+=dt,xp++,yp++)
{
float *xp = x, *yp = y;
float t, dt;
MaxY = -1E20; MinY = -MaxY;
int i;
{
*xp = t;
*yp = myfunc(t);
if(*yp>MaxY)
MaxY = *yp; if(*yp<MinY)
MinY = *yp; } MinX = a;
MaxX = b; }
float xscreen(float x)
{
return Xe0 + (int)((x-MinX)*ax);
}
float yscreen(float y)
{
return Ye1 - (int)((y-MinY)*ay);
}
void drawbg(char * xwrite, char * ywrite, char * gwrite)
{
int i, temp,
xn, yn; float xo[30], yo[30], dt; char s[40];
setcolor(14); setlinestyle(SOLID_LINE, 0, 1); rectangle(Xe0, Ye0, Xe1, Ye1);
setcolor(15);
temp = yscreen(0); if(temp>Ye0 && temp <Ye1) line(Xe0,temp,Xe1,temp); temp = xscreen(0); if(temp>Xe0 && temp<Xe1) line(temp,Ye0,temp,Ye1);
xn = 1 + (int)((Xe1-Xe0)/textwidth(teststr));
if(xn > 9) xn = 9;
yn = 1 + (int)((Ye1-Ye0)/textheight(teststr)/3);
if(yn>11) yn = 11;
dt = (MaxX - MinX) / xn ; xo[0] = MinX; for(i=1;i<xn+1;i++) xo[i]=xo[i-1]+dt;
dt = (MaxY - MinY) / yn; /* создаем оцифровку по оси Y */
yo7[0] = MinY; for(i=1;i<yn+1;i++) yo[i]=yo[i-1]+dt;
settextjustify(CENTER_TEXT,TOP_TEXT);
setcolor(7); /* серый цвет */
for(i=0;i<=xn;i++) {
temp = xscreen(xo[i]); if(i>0 && i<xn) { setlinestyle(DOTTED_LINE, 0, 1);
sprintf(s,"%6.2f",xo[i]);
outtextxy(temp, Ye1 + 3, s); }
settextjustify(RIGHT_TEXT,CENTER_TEXT);
for(i=0;i<=yn;i++) {
temp = yscreen(yo[i]); if(i>0 && i<yn) { setlinestyle(DOTTED_LINE, 0, 1);
line(Xe0, temp, Xe1, temp);
} setlinestyle(SOLID_LINE, 0, 1);
sprintf(s,"%6.2f",yo[i]); outtextxy(Xe0 - 3, temp, s); setlinestyle(SOLID_LINE, 0, 1);
settextjustify(RIGHT_TEXT,TOP_TEXT); outtextxy(Xe1,Ye1+6+textheight(xwrite),xwrite);
settextjustify(LEFT_TEXT,BOTTOM_TEXT);
outtextxy(Xe0, Ye0, ywrite);
settextjustify(CENTER_TEXT,BOTTOM_TEXT);
outtextxy(getmaxx()/2,getmaxy()-3,gwrite);
}
void drawgraph(void)
{
int xs1, ys1, xs2, ys2, i;
setcolor(15); #ifdef LINEGRAPH setlinestyle(SOLID_LINE, 0, 3); xs1 = xscreen(x[0]); ys1 = yscreen(y[0]); for(i=1;i<n;i++) { xs2 = xscreen(x[i]); ys2 = yscreen(y[i]);
line(xs1,ys1,xs2,ys2);
xs1 = xs2; ys1 = ys2;
}
#else
for(i=0;i<n;i++) { putpixel(xscreen(x[i]), yscreen(y[i]), 15);
} #endif }
void do_F1_proc(void)
{
sound(220); delay(300); sound(440) delay(300); sound(660); delay(300); sound(888); delay(300); nosound(); }
void do_else_proc(void)
{
sound(350); delay(500); nosound(); }
void main() {
char gwrite[40], xwrite[40], ywrite[40]; int key, lMore; clrscr();
puts
grinit();
setlimits();
#ifdef LINEGRAPH n=(Xe1 - Xe0)/8;
#else /* иначе */
n=(Xe1 - Xe0)/2; #endif
if(!allocatememory())
{
puts("Недостаточно памяти");
exit(-2);
} a = -3; b = 2;
fillarray();
ax = (Xe1 - Xe0) / (MaxX - MinX);
ay = (Ye1 - Ye0) / (MaxY - MinY);
strcpy(xwrite,"Ось X");
strcpy(ywrite,"Ось Y");
strcpy(gwrite,"Пример вывода графика");
drawbg(xwrite, ywrite, gwrite);
drawgraph();
lMore = 1; do {
while(kbhit()) getch(); key=getch(); if(key==0) key=getch(); switch(key) { case 27 :
lMore = 0; break; case 59 :
do_F1_proc(); break; deafult:
do_else_proc(); break; } } while(lMore);
freememory();
closegraph();
puts("Программа окончила работу");
} |
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Сообщение было отмечено Azdeman как решение
