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<td height="40" align="center" bgcolor="eeeeee"><font style="font-size:16px"><b>经典c程序100例==51--60</b></font></td>
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<td align="right"><font color="#999999">来源：<font color="#CC0000">郴州人才网</font>
时间：2004年10月27日8:10</font></td>
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<td class=c><font id="zoom" style="font-size:14px"><P><FONT color=#990000>【程序51】</FONT><BR>题目：学习使用按位与 & 。 <BR>1.程序分析：0&0=0; 0&1=0; 1&0=0; 1&1=1<BR>2.程序源代码：<BR>#include "stdio.h"<BR>main()<BR>{<BR>int a,b;<BR>a=077;<BR>b=a&3;<BR>printf("\40: The a & b(decimal) is %d \n",b);<BR>b&=7;<BR>printf("\40: The a & b(decimal) is %d \n",b);<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序52】</FONT><BR>题目：学习使用按位或 | 。<BR>1.程序分析：0|0=0; 0|1=1; 1|0=1; 1|1=1 <BR>2.程序源代码：<BR>#include "stdio.h"<BR>main()<BR>{<BR>int a,b;<BR>a=077;<BR>b=a|3;<BR>printf("\40: The a & b(decimal) is %d \n",b);<BR>b|=7;<BR>printf("\40: The a & b(decimal) is %d \n",b);<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序53】</FONT><BR>题目：学习使用按位异或 ^ 。 <BR>1.程序分析：0^0=0; 0^1=1; 1^0=1; 1^1=0<BR>2.程序源代码：<BR>#include "stdio.h"<BR>main()<BR>{<BR>int a,b;<BR>a=077;<BR>b=a^3;<BR>printf("\40: The a & b(decimal) is %d \n",b);<BR>b^=7;<BR>printf("\40: The a & b(decimal) is %d \n",b);<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序54】</FONT><BR>题目：取一个整数a从右端开始的4～7位。<BR>程序分析：可以这样考虑： <BR>(1)先使a右移4位。<BR>(2)设置一个低4位全为1,其余全为0的数。可用~(~0<<4)<BR>(3)将上面二者进行&运算。<BR>2.程序源代码：<BR>main()<BR>{<BR>unsigned a,b,c,d;<BR>scanf("%o",&a);<BR>b=a>>4;<BR>c=~(~0<<4);<BR>d=b&c;<BR>printf("%o\n%o\n",a,d);<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序55】</FONT><BR>题目：学习使用按位取反~。 <BR>1.程序分析：~0=1; ~1=0;<BR>2.程序源代码：<BR>#include "stdio.h"<BR>main()<BR>{<BR>int a,b;<BR>a=234;<BR>b=~a;<BR>printf("\40: The a's 1 complement(decimal) is %d \n",b);<BR>a=~a;<BR>printf("\40: The a's 1 complement(hexidecimal) is %x \n",a);<BR>} <BR>==============================================================<BR><FONT color=#990000>【程序56】</FONT><BR>题目：画图，学用circle画圆形。 <BR>1.程序分析：<BR>2.程序源代码：<BR>/*circle*/<BR>#include "graphics.h"<BR>main()<BR>{int driver,mode,i;<BR>float j=1,k=1;<BR>driver=VGA;mode=VGAHI;<BR>initgraph(&driver,&mode,"");<BR>setbkcolor(YELLOW);<BR>for(i=0;i<=25;i++)<BR>{<BR>setcolor(8);<BR>circle(310,250,k);<BR>k=k+j;<BR>j=j+0.3;<BR>}<BR>} <BR>==============================================================<BR><FONT color=#990000>【程序57】</FONT><BR>题目：画图，学用line画直线。<BR>1.程序分析： <BR>2.程序源代码：<BR>#include "graphics.h"<BR>main()<BR>{int driver,mode,i;<BR>float x0,y0,y1,x1;<BR>float j=12,k;<BR>driver=VGA;mode=VGAHI;<BR>initgraph(&driver,&mode,"");<BR>setbkcolor(GREEN);<BR>x0=263;y0=263;y1=275;x1=275;<BR>for(i=0;i<=18;i++)<BR>{<BR>setcolor(5);<BR>line(x0,y0,x0,y1);<BR>x0=x0-5;<BR>y0=y0-5;<BR>x1=x1+5;<BR>y1=y1+5;<BR>j=j+10;<BR>}<BR>x0=263;y1=275;y0=263;<BR>for(i=0;i<=20;i++)<BR>{<BR>setcolor(5);<BR>line(x0,y0,x0,y1);<BR>x0=x0+5;<BR>y0=y0+5;<BR>y1=y1-5;<BR>}<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序58】</FONT><BR>题目：画图，学用rectangle画方形。 <BR>1.程序分析：利用for循环控制100-999个数，每个数分解出个位，十位，百位。<BR>2.程序源代码：<BR>#include "graphics.h"<BR>main()<BR>{int x0,y0,y1,x1,driver,mode,i;<BR>driver=VGA;mode=VGAHI;<BR>initgraph(&driver,&mode,"");<BR>setbkcolor(YELLOW);<BR>x0=263;y0=263;y1=275;x1=275;<BR>for(i=0;i<=18;i++)<BR>{<BR>setcolor(1);<BR>rectangle(x0,y0,x1,y1);<BR>x0=x0-5;<BR>y0=y0-5;<BR>x1=x1+5;<BR>y1=y1+5;<BR>}<BR>settextstyle(DEFAULT_FONT,HORIZ_DIR,2);<BR>outtextxy(150,40,"How beautiful it is!");<BR>line(130,60,480,60);<BR>setcolor(2);<BR>circle(269,269,137);<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序59】</FONT><BR>题目：画图，综合例子。<BR>1.程序分析：<BR>2.程序源代码：<BR># define PAI 3.1415926<BR># define B 0.809<BR># include "graphics.h"<BR>#include "math.h"<BR>main()<BR>{<BR>int i,j,k,x0,y0,x,y,driver,mode;<BR>float a;<BR>driver=CGA;mode=CGAC0;<BR>initgraph(&driver,&mode,"");<BR>setcolor(3);<BR>setbkcolor(GREEN);<BR>x0=150;y0=100;<BR>circle(x0,y0,10);<BR>circle(x0,y0,20);<BR>circle(x0,y0,50);<BR>for(i=0;i<16;i++)<BR>{<BR> a=(2*PAI/16)*i;<BR> x=ceil(x0+48*cos(a));<BR> y=ceil(y0+48*sin(a)*B);<BR> setcolor(2); line(x0,y0,x,y);}<BR>setcolor(3);circle(x0,y0,60);<BR>/* Make 0 time normal size letters */<BR>settextstyle(DEFAULT_FONT,HORIZ_DIR,0);<BR>outtextxy(10,170,"press a key");<BR>getch();<BR>setfillstyle(HATCH_FILL,YELLOW);<BR>floodfill(202,100,WHITE);<BR>getch();<BR>for(k=0;k<=500;k++)<BR>{<BR> setcolor(3);<BR> for(i=0;i<=16;i++)<BR> {<BR> a=(2*PAI/16)*i+(2*PAI/180)*k;<BR> x=ceil(x0+48*cos(a));<BR> y=ceil(y0+48+sin(a)*B);<BR> setcolor(2); line(x0,y0,x,y);<BR> }<BR> for(j=1;j<=50;j++)<BR> {<BR> a=(2*PAI/16)*i+(2*PAI/180)*k-1;<BR> x=ceil(x0+48*cos(a));<BR> y=ceil(y0+48*sin(a)*B);<BR> line(x0,y0,x,y);<BR> }<BR>}<BR>restorecrtmode();<BR>}<BR>==============================================================<BR><FONT color=#990000>【程序60】</FONT><BR>题目：画图，综合例子。 <BR>1.程序分析：<BR>2.程序源代码：<BR>#include "graphics.h"<BR>#define LEFT 0<BR>#define TOP 0<BR>#define RIGHT 639<BR>#define BOTTOM 479<BR>#define LINES 400<BR>#define MAXCOLOR 15<BR>main()<BR>{<BR>int driver,mode,error;<BR>int x1,y1;<BR>int x2,y2;<BR>int dx1,dy1,dx2,dy2,i=1;<BR>int count=0;<BR>int color=0;<BR>driver=VGA;<BR>mode=VGAHI;<BR>initgraph(&driver,&mode,"");<BR>x1=x2=y1=y2=10;<BR>dx1=dy1=2;<BR>dx2=dy2=3;<BR>while(!kbhit())<BR>{<BR> line(x1,y1,x2,y2);<BR> x1+=dx1;y1+=dy1;<BR> x2+=dx2;y2+dy2;<BR> if(x1<=LEFT||x1>=RIGHT)<BR> dx1=-dx1;<BR> if(y1<=TOP||y1>=BOTTOM)<BR> dy1=-dy1;<BR> if(x2<=LEFT||x2>=RIGHT)<BR> dx2=-dx2;<BR> if(y2<=TOP||y2>=BOTTOM)<BR> dy2=-dy2;<BR> if(++count>LINES)<BR> {<BR> setcolor(color);<BR> color=(color>=MAXCOLOR)?0:++color;<BR> }<BR>}<BR>closegraph();<BR>}</P> </font><br>
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