鹏字起名鹏字在前面:经典程序100例（51-60）

　　　经典c程序100例==51--60【程序51】题目：学习使用按位与 & 。　　　1.程序分析：0&0=0; 0&1=0; 1&0=0; 1&1=12.程序源代码：#include "stdio.h"main(){int a,b;a=077;b=a&3;printf("\40: The a & b(decimal) is %d \n",b);b&=7;printf("\40: The a & b(decimal) is %d \n",b);}==============================================================【程序52】题目：学习使用按位或 | 。1.程序分析：0|0=0; 0|1=1; 1|0=1; 1|1=1　　　　　　　　　　　　2.程序源代码：#include "stdio.h"main(){int a,b;a=077;b=a|3;printf("\40: The a & b(decimal) is %d \n",b);b|=7;printf("\40: The a & b(decimal) is %d \n",b);}==============================================================【程序53】题目：学习使用按位异或 ^ 。　　　1.程序分析：0^0=0; 0^1=1; 1^0=1; 1^1=02.程序源代码：#include "stdio.h"main(){int a,b;a=077;b=a^3;printf("\40: The a & b(decimal) is %d \n",b);b^=7;printf("\40: The a & b(decimal) is %d \n",b);}==============================================================【程序54】题目：取一个整数a从右端开始的4～7位。程序分析：可以这样考虑：(1)先使a右移4位。(2)设置一个低4位全为1,其余全为0的数。可用~(~0<<4)(3)将上面二者进行&运算。2.程序源代码：main(){unsigned a,b,c,d;scanf("%o",&a);b=a>>4;c=~(~0<<4);d=b&c;printf("%o\n%o\n",a,d);}==============================================================【程序55】题目：学习使用按位取反~。　　　1.程序分析：~0=1; ~1=0;2.程序源代码：#include "stdio.h"main(){int a,b;a=234;b=~a;printf("\40: The a‘s 1 complement(decimal) is %d \n",b);a=~a;printf("\40: The a‘s 1 complement(hexidecimal) is %x \n",a);}==============================================================【程序56】题目：画图，学用circle画圆形。　　　1.程序分析：2.程序源代码：/*circle*/#include "graphics.h"main(){int driver,mode,i;float j=1,k=1;driver=VGA;mode=VGAHI;initgraph(&driver,&mode,"");setbkcolor(YELLOW);for(i=0;i<=25;i++){setcolor(8);circle(310,250,k);k=k+j;j=j+0.3;}}==============================================================【程序57】题目：画图，学用line画直线。1.程序分析：　　　　　　　　　　　2.程序源代码：#include "graphics.h"main(){int driver,mode,i;float x0,y0,y1,x1;float j=12,k;driver=VGA;mode=VGAHI;initgraph(&driver,&mode,"");setbkcolor(GREEN);x0=263;y0=263;y1=275;x1=275;for(i=0;i<=18;i++){setcolor(5);line(x0,y0,x0,y1);x0=x0-5;y0=y0-5;x1=x1+5;y1=y1+5;j=j+10;}x0=263;y1=275;y0=263;for(i=0;i<=20;i++){setcolor(5);line(x0,y0,x0,y1);x0=x0+5;y0=y0+5;y1=y1-5;}}==============================================================【程序58】题目：画图，学用rectangle画方形。　　　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。2.程序源代码：#include "graphics.h"main(){int x0,y0,y1,x1,driver,mode,i;driver=VGA;mode=VGAHI;initgraph(&driver,&mode,"");setbkcolor(YELLOW);x0=263;y0=263;y1=275;x1=275;for(i=0;i<=18;i++){setcolor(1);rectangle(x0,y0,x1,y1);x0=x0-5;y0=y0-5;x1=x1+5;y1=y1+5;}settextstyle(DEFAULT_FONT,HORIZ_DIR,2);outtextxy(150,40,"How beautiful it is!");line(130,60,480,60);setcolor(2);circle(269,269,137);}==============================================================【程序59】题目：画图，综合例子。1.程序分析：2.程序源代码：# 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();}==============================================================【程序60】题目：画图，综合例子。　　　1.程序分析：2.程序源代码：#include "graphics.h"#define LEFT 0#define TOP 0#define RIGHT 639#define BOTTOM 479#define LINES 400#define MAXCOLOR 15main(){int driver,mode,error;int x1,y1;int x2,y2;int dx1,dy1,dx2,dy2,i=1;int count=0;int color=0;driver=VGA;mode=VGAHI;initgraph(&driver,&mode,"");x1=x2=y1=y2=10;dx1=dy1=2;dx2=dy2=3;while(!kbhit()){　line(x1,y1,x2,y2);　x1+=dx1;y1+=dy1;　x2+=dx2;y2+dy2;　if(x1<=LEFT||x1>=RIGHT)　dx1=-dx1;　if(y1<=TOP||y1>=BOTTOM)　　dy1=-dy1;　if(x2<=LEFT||x2>=RIGHT)　　dx2=-dx2;　if(y2<=TOP||y2>=BOTTOM)　　dy2=-dy2;　if(++count>LINES)　{　　setcolor(color);　　color=(color>=MAXCOLOR)?0:++color;　}}closegraph();}