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C语言程序设计100例

2014-03-27 17:51 267 查看
main()

{int i,j;

int a[10][10];

printf("\n");

for(i=0;i<10;i++)

  {a[i][0]=1;

  a[i][i]=1;}

for(i=2;i<10;i++)

  for(j=1;j<i;j++)

  a[i][j]=a[i-1][j-1]+a[i-1][j];

for(i=0;i<10;i++)

  {for(j=0;j<=i;j++)

  printf("%5d",a[i][j]);

  printf("\n");

  }

}

-----------------------------------------------------------------------------
【程序62】

题目:学习putpixel画点。

1.程序分析:            

2.程序源代码:

#include "stdio.h"

#include "graphics.h"

main()

{

int i,j,driver=VGA,mode=VGAHI;

initgraph(&driver,&mode,"");

setbkcolor(YELLOW);

for(i=50;i<=230;i+=20)

  for(j=50;j<=230;j++)

  putpixel(i,j,1);

for(j=50;j<=230;j+=20)

  for(i=50;i<=230;i++)

  putpixel(i,j,1);

}

-----------------------------------------------------------------------------
【程序63】

题目:画椭圆ellipse   

1.程序分析:

2.程序源代码:

#include "stdio.h"

#include "graphics.h"

#include "conio.h"

main()

{

int x=360,y=160,driver=VGA,mode=VGAHI;

int num=20,i;

int top,bottom;

initgraph(&driver,&mode,"");

top=y-30;

bottom=y-30;

for(i=0;i<num;i++)

{

ellipse(250,250,0,360,top,bottom);

top-=5;

bottom+=5;

}

getch();
}
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