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<TD class=zi width=562 valign="middle"><b><font color="#ffffff">.:.:經(jīng)典c程序100例==51--60:.:.</font></b></TD>
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<p align="left"><font color="#FF9933"><b><font size="5"> <font color="#3300CC">經(jīng)典c程序100例==51--60</font></font></b></font></p>
<p><font color="#990000">【程序51】</font><br>
題目：學習使用按位與 & 。 <br>
1.程序分析：0&0=0; 0&1=0; 1&0=0; 1&1=1<br>
2.程序源代碼：<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>
題目：學習使用按位或 | 。<br>
1.程序分析：0|0=0; 0|1=1; 1|0=1; 1|1=1 <br>
2.程序源代碼：<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>
題目：學習使用按位異或 ^ 。 <br>
1.程序分析：0^0=0; 0^1=1; 1^0=1; 1^1=0<br>
2.程序源代碼：<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>
題目：取一個整數(shù)a從右端開始的4～7位。<br>
程序分析：可以這樣考慮： <br>
(1)先使a右移4位。<br>
(2)設置一個低4位全為1,其余全為0的數(shù)。可用~(~0<<4)<br>
(3)將上面二者進行&運算。<br>
2.程序源代碼：<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>
題目：學習使用按位取反~。 <br>
1.程序分析：~0=1; ~1=0;<br>
2.程序源代碼：<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>
題目：畫圖，學用circle畫圓形。 <br>
1.程序分析：<br>
2.程序源代碼：<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>
題目：畫圖，學用line畫直線。<br>
1.程序分析： <br>
2.程序源代碼：<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>
題目：畫圖，學用rectangle畫方形。 <br>
1.程序分析：利用for循環(huán)控制100-999個數(shù)，每個數(shù)分解出個位，十位，百位。<br>
2.程序源代碼：<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>
題目：畫圖，綜合例子。<br>
1.程序分析：<br>
2.程序源代碼：<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>
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