【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=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=0
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);
}//代码效果参考:http://www.zidongmutanji.com/bxxx/223636.html
==============================================================
【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=(2PAI/16)i;
x=ceil(x0+48cos(a));
y=ceil(y0+48sin(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=(2PAI/16)i+(2PAI/180)k;
x=ceil(x0+48cos(a));
y=ceil(y0+48+sin(a)B);
setcolor(2); line(x0,y0,x,y);
}
for(j=1;j<=50;j++)
{
a=(2PAI/16)i+(2PAI/180)k-1;
x=ceil(x0+48cos(a));
y=ceil(y0+48sin(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 15
main()
{
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();
}
经典c程序100例==61--70
【程序61】
题目:打印出杨辉三角形(要求打印出10行如下图)
1.程序分析:
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
2.程序源代码:
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();
}
【程序64】
题目:利用ellipse and rectangle 画图。
1.程序分析:
2.程序源代码:
include "stdio.h"
include "graphics.h"
include "conio.h"
main()
{
int driver=VGA,mode=VGAHI;
int i,num=15,top=50;
int left=20,right=50;
initgraph(&driver,&mode,"");
for(i=0;i<num;i++)
{
ellipse(250,250,0,360,right,left);
ellipse(250,250,0,360,20,top);
rectangle(20-2i,20-2i,10(i+2),10(i+2));
right+=5;
left+=5;
top+=10;
}
getch();
}
【程序65】
题目:一个最优美的图案。
1.程序分析:
2.程序源代码:
include "graphics.h"
include "math.h"
include "dos.h"
include "conio.h"
include "stdlib.h"
include "stdio.h"
include "stdarg.h"
define MAXPTS 15
define PI 3.1415926
struct PTS {
int x,y;
};
double AspectRatio=0.85;
void LineToDemo(void)
{
struct viewporttype vp;
struct PTS points[MAXPTS];
int i, j, h, w, xcenter, ycenter;
int radius, angle, step;
double rads;
printf(" MoveTo / LineTo Demonstration" );
getviewsettings( &vp );
h = vp.bottom - vp.top;
w = vp.right - vp.left;
xcenter = w / 2; / Determine the center of circle /
ycenter = h / 2;
radius = (h - 30) / (AspectRatio 2);
step = 360 / MAXPTS; / Determine # of increments /
angle = 0; / Begin at zero degrees /
for( i=0 ; i<MAXPTS ; ++i ){ / Determine circle intercepts /
rads = (double)angle PI / 180.0; / Convert angle to radians /
points[i].x = xcenter + (int)( cos(rads) radius );
points[i].y = ycenter - (int)( sin(rads) radius AspectRatio );
angle += step; / Move to next increment /
}
circle( xcenter, ycenter, radius ); / Draw bounding circle /
for( i=0 ; i<MAXPTS ; ++i ){ / Draw the cords to the circle /
for( j=i ; j<MAXPTS ; ++j ){ / For each remaining intersect /
moveto(points[i].x, points[i].y); / Move to beginning of cord /
lineto(points[j].x, points[j].y); / Draw the cord */
} } }
main()
{int driver,mode;
driver=CGA;mode=CGAC0;
initgraph(&driver,&mode,"");
setcolor(3);
setbkcolor(GREEN);
LineToDemo();}
【程序66】
题目:输入3个数a,b,c,按大小顺序输出。
1.程序分析:利用指针方法。
2.程序源代码:
/pointer/
main()
{
int n1,n2,n3;
int pointer1,pointer2,pointer3;
printf("please input 3 number:n1,n2,n3:");
scanf("%d,%d,%d",&n1,&n2,&n3);
pointer1=&n1;
pointer2=&n2;
pointer3=&n3;
if(n1>n2) swap(pointer1,pointer2);
if(n1>n3) swap(pointer1,pointer3);
if(n2>n3) swap(pointer2,pointer3);
printf("the sorted numbers are:%d,%d,%d\n",n1,n2,n3);
}
swap(p1,p2)
int p1,p2;
{int p;
p=p1;p1=p2;*p2=p;
}//代码效果参考:http://www.zidongmutanji.com/bxxx/133228.html
==============================================================
【程序67】
题目:输入数组,最大的与第一个元素交换,最小的与最后一个元素交换,输出数组。
1.程序分析:谭浩强的书中答案有问题。
2.程序源代码:
main()
{
int number[10];
input(number);
max_min(number);
output(number);
}
input(number)
int number[10];
{int i;
for(i=0;i<9;i++) scanf("%d,",&number[i]); scanf("%d",&number[9]); } max_min(array) int array[10]; {int *max,*min,k,l; int *p,*arr_end; arr_end=array+10; max=min=array; for(p=array+1;pmax) max=p;
else if(p<min) min=p;
k=max;
l=min; p=array[0];array[0]=l;l=p; p=array[9];array[9]=k;k=p;
return;
}
output(array)
int array[10];
{ int p;
for(p=array;p<array+9;p++)
printf("%d,",*p);
printf("%d\n",array[9]);
}
【程序68】
题目:有n个整数,使其前面各数顺序向后移m个位置,最后m个数变成最前面的m个数
1.程序分析:
2.程序源代码:
main()
{
int number[20],n,m,i;
printf("the total numbers is:");
scanf("%d",&n);
printf("back m:");
scanf("%d",&m);
for(i=0;iarray;p--)
p=(p-1);
*array=array_end;
m--;
if(m>0) move(array,n,m);
}
【程序69】
题目:有n个人围成一圈,顺序排号。从第一个人开始报数(从1到3报数),凡报到3的人退出
圈子,问最后留下的是原来第几号的那位。
- 程序分析:
2.程序源代码:define nmax 50
main()
{
int i,k,m,n,num[nmax],p;
printf("please input the total of numbers:");
scanf("%d",&n);
p=num;
for(i=0;i<n;i++) (p+i)=i+1;
i=0;
k=0;
m=0;
while(m<n-1)
{
if((p+i)!=0) k++;
if(k==3)
{ (p+i)=0;
k=0;
m++;
}
i++;
if(i==n) i=0;
}
while(p==0) p++;
printf("%d is left\n",p);}
【程序70】
题目:写一个函数,求一个字符串的长度,在main函数中输入字符串,并输出其长度。
1.程序分析:
2.程序源代码:
main()
{
int len;
char str[20];
printf("please input a string:\n");
scanf("%s",str);
len=length(str);
printf("the string has %d characters.",len);
}
length(p)
char p;
{
int n;
n=0;
while(*p!='\0')
{
n++;
p++;
}
return n;
}
经典c程序100例==71--80
【程序71】
题目:编写input()和output()函数输入,输出5个学生的数据记录。
1.程序分析:
2.程序源代码:
define N 5
struct student
{ char num[6];
char name[8];
int score[4];
} stu[N];
input(stu)
struct student stu[];
{ int i,j;
for(i=0;i<N;i++)
{ printf("\n please input %d of %d\n",i+1,N);
printf("num: ");
scanf("%s",stu[i].num);
printf("name: ");
scanf("%s",stu[i].name);
for(j=0;j<3;j++)
{ printf("score %d.",j+1);
scanf("%d",&stu[i].score[j]);
}
printf("\n");
}
}
print(stu)
struct student stu[];
{ int i,j;
printf("\nNo. Name Sco1 Sco2 Sco3\n");
for(i=0;i<N;i++)
{ printf("%-6s%-10s",stu[i].num,stu[i].name);
for(j=0;j<3;j++)
printf("%-8d",stu[i].score[j]);
printf("\n");
}
}
main()
{
input();
print();
}
【程序72】
题目:创建一个链表。
1.程序分析:
2.程序源代码:
/creat a list/
include "stdlib.h"
include "stdio.h"
struct list
{ int data;
struct list next;
};
typedef struct list node;
typedef node link;
void main()
{ link ptr,head;
int num,i;
ptr=(link)malloc(sizeof(node));
ptr=head;
printf("please input 5 numbers==>\n");
for(i=0;i<=4;i++)
{
scanf("%d",&num);
ptr->data=num;
ptr->next=(link)malloc(sizeof(node));
if(i==4) ptr->next=NULL;
else ptr=ptr->next;
}
ptr=head;
while(ptr!=NULL)
{ printf("The value is ==>%d\n",ptr->data);
ptr=ptr->next;
}
}
【程序73】
题目:反向输出一个链表。
1.程序分析:
2.程序源代码:
/reverse output a list/
include "stdlib.h"
include "stdio.h"
struct list
{ int data;
struct list next;
};
typedef struct list node;
typedef node link;
void main()
{ link ptr,head,tail;
int num,i;
tail=(link)malloc(sizeof(node));
tail->next=NULL;
ptr=tail;
printf("\nplease input 5 data==>\n");
for(i=0;i<=4;i++)
{
scanf("%d",&num);
ptr->data=num;
head=(link)malloc(sizeof(node));
head->next=ptr;
ptr=head;
}
ptr=ptr->next;
while(ptr!=NULL)
{ printf("The value is ==>%d\n",ptr->data);
ptr=ptr->next;
}}
【程序74】
题目:连接两个链表。
1.程序分析:
2.程序源代码:
include "stdlib.h"
include "stdio.h"
struct list
{ int data;
struct list next;
};
typedef struct list node;
typedef node link;
link delete_node(link pointer,link tmp)
{if (tmp==NULL) /delete first node/
return pointer->next;
else
{ if(tmp->next->next==NULL)/delete last node/
tmp->next=NULL;
else /delete the other node/
tmp->next=tmp->next->next;
return pointer;
}
}//代码效果参考:http://www.zidongmutanji.com/zsjx/411759.html
void selection_sort(link pointer,int num)
{ link tmp,btmp;
int i,min;
for(i=0;idata;
btmp=NULL;
while(tmp->next)
{ if(min>tmp->next->data)
{min=tmp->next->data;
btmp=tmp;
}
tmp=tmp->next;
}
printf("\40: %d\n",min);
pointer=delete_node(pointer,btmp);
}
}
link create_list(int array[],int num)
{ link tmp1,tmp2,pointer;
int i;
pointer=(link)malloc(sizeof(node));
pointer->data=array[0];
tmp1=pointer;
for(i=1;inext=NULL;
tmp2->data=array[i];
tmp1->next=tmp2;
tmp1=tmp1->next;
}
return pointer;
}
link concatenate(link pointer1,link pointer2)
{ link tmp;
tmp=pointer1;
while(tmp->next)
tmp=tmp->next;
tmp->next=pointer2;
return pointer1;
}
void main(void)
{ int arr1[]={3,12,8,9,11};
link ptr;
ptr=create_list(arr1,5);
selection_sort(ptr,5);
}
【程序75】
题目:放松一下,算一道简单的题目。
1.程序分析:
2.程序源代码:
main()
{
int i,n;
for(i=1;i<5;i++)
{ n=0;
if(i!=1)
n=n+1;
if(i==3)
n=n+1;
if(i==4)
n=n+1;
if(i!=4)
n=n+1;
if(n==3)
printf("zhu hao shi de shi:%c",64+i);
}
}
【程序76】
题目:编写一个函数,输入n为偶数时,调用函数求1/2+1/4+...+1/n,当输入n为奇数时,调用函数
1/1+1/3+...+1/n(利用指针函数)
1.程序分析:
2.程序源代码:
main()
include "stdio.h"
main()
{
float peven(),podd(),dcall();
float sum;
int n;
while (1)
{
scanf("%d",&n);
if(n>1)
break;
}
if(n%2==0)
{
printf("Even=");
sum=dcall(peven,n);
}
else
{
printf("Odd=");
sum=dcall(podd,n);
}
printf("%f",sum);
}
float peven(int n)
{
float s;
int i;
s=1;
for(i=2;i<=n;i+=2)
s+=1/(float)i;
return(s);
}
float podd(n)
int n;
{
float s;
int i;
s=0;
for(i=1;i<=n;i+=2)
s+=1/(float)i;
return(s);
}
float dcall(fp,n)
float (fp)();
int n;
{
float s;
s=(fp)(n);
return(s);
}
【程序77】
题目:填空练习(指向指针的指针)
1.程序分析:
2.程序源代码:
main()
{ char s[]={"man","woman","girl","boy","sister"};
char **q;
int k;
for(k=0;k<5;k++)
{ ;/这里填写什么语句/
printf("%s\n",q);
}
}
【程序78】
题目:找到年龄最大的人,并输出。请找出程序中有什么问题。
1.程序分析:
2.程序源代码:
define N 4
include "stdio.h"
static struct man
{ char name[20];
int age;
} person[N]={"li",18,"wang",19,"zhang",20,"sun",22};
main()
{struct man q,p;
int i,m=0;
p=person;
for (i=0;iage)
q=p++;
m=q->age;}
printf("%s,%d",(q).name,(q).age);
}
【程序79】
题目:字符串排序。
1.程序分析:
2.程序源代码:
main()
{
char str1[20],str2[20],str3[20];
char swap();
printf("please input three strings\n");
scanf("%s",str1);
scanf("%s",str2);
scanf("%s",str3);
if(strcmp(str1,str2)>0) swap(str1,str2);
if(strcmp(str1,str3)>0) swap(str1,str3);
if(strcmp(str2,str3)>0) swap(str2,str3);
printf("after being sorted\n");
printf("%s\n%s\n%s\n",str1,str2,str3);
}
char swap(p1,p2)
char p1,p2;
{
char p[20];
strcpy(p,p1);strcpy(p1,p2);strcpy(p2,p);
}
【程序80】
题目:海滩上有一堆桃子,五只猴子来分。第一只猴子把这堆桃子凭据分为五份,多了一个,这只
猴子把多的一个扔入海中,拿走了一份。第二只猴子把剩下的桃子又平均分成五份,又多了
一个,它同样把多的一个扔入海中,拿走了一份,第三、第四、第五只猴子都是这样做的,
问海滩上原来最少有多少个桃子?
1.程序分析:
2.程序源代码:
main()
{int i,m,j,k,count;
for(i=4;i<10000;i+=4)
{ count=0;
m=i;
for(k=0;k<5;k++)
{
j=i/4*5+1;
i=j;
if(j%4==0)
count++;
else
break;
}
i=m;
if(count==4)
{printf("%d\n",count);
break;}
}
}