百度问问Y=cosX X=0 Y=0 X=π 绕Y轴旋转 所得的旋转体的体积是多少
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发布时间:2022-04-30 22:36
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热心网友
时间:2022-06-19 17:35
# define PAI 3.1415926
# define B 0.809
# include "graphics.h"
#include "math.h"
main()
{
int i,j,k,x0,y0,x,y,driver,mode;
float a;
driver=CGA;mode=CGAC0;
initgraph(&driver,&mode,"");
setcolor(3);
setbkcolor(GREEN);
x0=150;y0=100;
circle(x0,y0,10);
circle(x0,y0,20);
circle(x0,y0,50);
for(i=0;i<16;i++)
{
a=(2*PAI/16)*i;
x=ceil(x0+48*cos(a));
y=ceil(y0+48*sin(a)*B);
setcolor(2); line(x0,y0,x,y);}
setcolor(3);circle(x0,y0,60);
/* Make 0 time normal size letters */
settextstyle(DEFAULT_FONT,HORIZ_DIR,0);
outtextxy(10,170,"press a key");
getch();
setfillstyle(HATCH_FILL,YELLOW);
floodfill(202,100,WHITE);
getch();
for(k=0;k<=500;k++)
{
setcolor(3);
for(i=0;i<=16;i++)
{
a=(2*PAI/16)*i+(2*PAI/180)*k;
x=ceil(x0+48*cos(a));
y=ceil(y0+48+sin(a)*B);
setcolor(2); line(x0,y0,x,y);
}
for(j=1;j<=50;j++)
{
a=(2*PAI/16)*i+(2*PAI/180)*k-1;
x=ceil(x0+48*cos(a));
y=ceil(y0+48*sin(a)*B);
line(x0,y0,x,y);
}
}
restorecrtmode();
}
热心网友
时间:2022-06-19 17:35
V=2*π*∫(arccosy)^2dy 积分区间为【0,1】
热心网友
时间:2022-06-19 17:36
1/3 pai的三次方?