C语言例题3.docx

1、C语言例题31.输入两个实数，按从小到大的顺序。#includevoid main()float a,b,t;scanf(%f,%f,&a,&b);if(ab)t=a; a=b; b=t;printf(%5.2f,%5.2fn,a,b);2.输入三角行的三边长,求三角形面积.#include#includevoid main()float a,b,c,s,area;scanf(%f,%f,%f,&a,&b,&c);s=1.0/2*(a+b+c);area=sqrt(s*(s-a)*(s-b)*(s-c);printf(a=%7.2f, b=%7.2f, c=%7.2f, s=%7.2fn,a,

2、b,c,s);printf(area=%7.2fn,area);3.从键盘输入一个大写字母，要求改用小写字母输出。#includevoid main()char c1,c2;c1=getchar();printf(%c,%dn,c1,c1);c2=c1+32;printf(%c,%d,c2,c2);4.编一程序，输入一个x的值，输出y值#includevoid main()int x,y; scanf(%d,&x); if(x0) y=-1; else if(x=0)y=0; else y=1;printf(x=%d,y=%dn,x,y);5.输入一个字符，判断他是否大写字母；如果是，把他转换

3、成小写字母；如果不是，不转换。然后输出最后得到的字符。#includevoid main()char ch;scanf(%c,&h);ch=(ch=A&ch=Z)?(ch+32):ch;printf(%cn,ch);6.判断某一年是否闰年。#includevoid main()int year,leap;scanf(%d,&year);if(year%4=0)if(year%100=0) if(year%400=0) leap=1; else leap=0; else leap=1;else leap=0;if(leap)printf(%d is ,year);else printf(%d i

4、s not,year);printf(a leap year.n”);7.求从一加到一百的和。#includevoid main()int i,sum=0;i=1;while(i=100)sum=sum+i;i+;printf(%dn,sum);8.判断m是否素数。#include#includevoid main()int m,i,k;scanf(%d,&m);k=sqrt(m);for(i=2;ik)printf(%d is a prime numbern,m);else printf(%d is not a prime numbern,m);9.将一个二维数组行和列的元素互换，存到另一个

5、数组中。 #includevoid main()int a23=1,2,3,4,5,6; int b32,i,j; printf(array a:n); for(i=0;i=1;i+) for(j=0;j=2;j+) printf(%5d,aij); bji=aij; printf(n); printf(array b:n); for(i=0;i=2;i+) for(j=0;j=1;j+) printf(%5d,bij); printf(n)10.有一个3*4的矩阵，要求编程序求出其中值最大的哪个元素的值，以及求其所在的行号和列号。#includevoid main()int i,j,row=

6、0,colum=0,max; int a34=1,2,3,4,9,8,7,6，-10，10，-5，2； max=a00; for(i=0;i=2;i+) for(j=0;jmax) max=aij; row=i; colum=j;printf(max=%d,row=%d,colum=%dn,max,row,colum);11.输出一个菱形图。#includevoid main()char diamond=5=,*,*,*,*,*,*,*,* int i,j; for(i=0;i5;i+) for(j=0;j=5;j+) printf(%c,diamondij); printf(n)12.调用函

7、数时的数据传递。#includevoid main()int max(int x,int y);int a,b,c;scanf(%d,%d,&a,&b);c=max(a,b);printf(Max is %d,c);int max(int x,int y)int z; z=xy?x:y; return(z);13.返回值类型与函数类型不同。#includevoid main()int max(float x,float y);float a,b;int c;scanf(%f,%f,&a,&b);c=max(a,b);printf(Max is %dn,c);int max(float x,fl

8、oat y)float z;z=xy?x:y;return(z);14.用递归方法求n!#includevoid main()float fac(int n); int n; float y; printf(input an integer number:); scanf(%d,&n); y=fac(n); printf(%d!=%10.0fn,n,y);float fac(int n)float f; if(n0) printf(n0,dataerror!); else if(n=0/n=1) f=1; else f=fac(n-1)*n; return(f);1.圆半径R=1.5，圆柱高H

9、=3，求圆周长，圆面积，圆球表面积，圆球体积，圆柱体积。#includevoid main()float h,r,l,s,sq,vq,vz;float pi=3.1415926;scanf(%f,%f,&r,&h);l=2*pi*r;s=r*r*pi;sq=4*pi*r*r;vq=4.0/3.0*pi*r*r*r;vz=pi*r*r*h;printf(l=%6.2fn,l);printf(s=%6.2fn,s);printf(sq=%6.2fn,sq);printf(vq=%6.2fn,vq);printf(vz=%6.2fn,vz);2.输入一个华氏温度，要求输出摄氏温度。公式C=5/9（F

10、-32）#includevoid main()float c,f;scanf(%f,&f);c=(5.0/9.0)*(f-32);printf(%5.2fn,c);3.有三个整数a.b.c,有键盘输入，输出其中最大者。#includevoid main()int a,b, c;scanf(%d,%d,%d,&a,&b,&c);if(ab) if(bC) printf(max=%dn,c); else printf(max=%dn,b);else if(ac) printf(max=%dn,c); else printf(max=%dn,a);4.有一函数 X (X1) Y=2X-1 (1=X=

11、10) #includevoid main()int x, y;scanf(%d,&x);if(x1)y=x;printf(x=%3d,y=x=%dn,x,y); else if(x10)y=2*x-1; printf(x=%3d,y=2*x-1=%dn,x,y);else y=3*x-11; printf(x=%3d,y=3*x-11=%dn,x,y);5.输入两个正整数M和N，求其最大公约数和最小公倍数。#includevoid main()int p,r,n,m,temp;scanf(%d,%d,&n,&m);if(nm)temp=n; n=m; m=temp;p=n*m;while(m

12、!=0)r=n%m; n=m; m=r;printf(%dn,n); printf(%dn,p/n);6.输入一行字符，分别统计其中的字母。空格。数字和其他字符的个数。#includevoid main()char c;int letters=0,space=0,digit=0,other=o;while(c=getchar()!=n)if(c=a&c=A&c=0&c=9)digit+;else other+;printf(%dn%dn%dn%dn,letters,space,digit,other);7.输出所有的“水仙花数”，所谓“水仙花数”是指一个三位数，其各位数字立方和等于该数本身。#

13、includevoid main()int i,j,k,n;printf(narcissus numbers are);for(n=100;n1000;n+)i=n/100;j=n/10-i*10;k=n%10;if(n=i*i*i+j*j*j+k*k*k)printf(%d,n);8.将一个数组中的值按逆序重新存放。#include#define N 5void main()int aN,i,temp;printf(enter array a:n);for(i=0;iN;i+)scanf(%d,&ai);printf(array a:n);for(i=0;iN;i+)printf(%4d,a

14、i);for(i=0;iN/2;i+)temp=ai;ai=an-i-1;an-i-1=temp;printf(nNow,array a:n);for(i=0;iN;i+)printf(%4d,ai);(一)输入三角形的三边长，求三角形的面积。#include#includevoid main()float a,b,c,s,area;scanf(%f,%f,%f,&a,&b,&c);s=1.0/2*(a+b+c);area=sqrt(s*(s-a)*(s-b)*(s-c);printf(a=%7.2f, b=%7.2f, c=%7.2f, s=%7.2fn,a,b,c,s);printf(ar

15、ea=%7.2fn,area);（二）从键盘输入一个大写字母，要求改用小写字母输出#includevoid main()char c1,c2;c1=getchar();printf(%c,%dn,c1,c2);c2=c1+32;printf(%c,%dn,c2,c2);(三)设圆半径为1.5，圆柱高为3，求圆周长，圆面积，圆球表面，圆球体积，圆柱体积。#includevoid main()float h,r,l,s,sq,vq,vz;float pi=3.1415926;scanf(%f,%f,&r,&h);l=2*pi*r;s=r*r*pi;sq=4*pi*r*r;vq=4.0/3.0*pi

16、*r*r*r;vz=pi*r*r*h;printf(l=%6.2fn,l);printf(s=%6.2fn,s);printf(sq=%6.2n,sq);printf(vq=%6.2fn,vq);printf(vz=%6.2fn,vz);(四)输入一个华氏温度，要求输出摄氏温度。公式为c=5/9(F-32)输出要有文字说明，取2位小数。#includevoid main()float c,f;scanf(%f,&f);c=(5.0/9.0)*(f-32);printf(%5.2fn,c);(五)输入两个实数，按代数值由小到大的顺序输出这两个数。#includevoid main()float

17、a,b,t;scanf(%f,%f,&a,&b);if(ab)t=a;a=b;b=t;printf(%5.2f,%5.2fn,a,b);(六)有一函数：y=-1(x0)编一个程序，输入一个X值，输出Y值。#includevoid main()int x,y;scanf(%d,&x);if(x0)y=-1;elseif(x=0)y=0;elsey=1;printf(x=%d,y=%dn,x,y);(7)输入一个字符，判别他是否大写字母，如果时，将它转换成小写字母，如果不是，不转换。然后输出最后得到的字符。#includevoid main()char ch;scanf(%c,&ch);ch=(c

18、h=A&ch=Z)?(ch+32):ch;printf(%cn,ch);(8)写程序，判断某一年是否闰年。#includevoid main()int year,leap;scanf(%d,&year);if(year%4=0)if(year%100=0)if(year%400=0)leap=1;elseleap=0;elseleap=1;elseleap=0;if(leap)printf(%d is,year);elseprintf(%d is not,year);printf(a leap year.n);(9)有三个整数a,b,c,有键盘输入，输出其中最大的数。#includevoid

19、main()int a,b,c;scanf(%d,%d,%d,&a,&b,&c);if(ab)if(bc)printf(max=%dn,c);elseprintf(max=%dn,b);elseif(ac)printf(max=%dn,c);elseprintf(max=%dn,a);(10)求前N项和，从1到100。#includevoid main()int i,sum=0;i=1;while(i=100)sum=sum+i;i+;printf(%dn,sum);(11)有一个函数：y=x x1;2x-1 1=x=10,写一段程序，输入X，输出Y#includevoid main()int

20、 x,y;scanf(%d,&x);if(x1)y=x;printf(x=%3d,y=x=%dn,x,y);else if(x10)y=2*x-1;printf(x=%3d,y=2*x-1=%dn,x,y);elsey=3*x-11;printf(x=%3d,y=3*x-11=%dn,x,y);(12)判断M是否素数#include#includevoid main()int m,i,k;scanf(%d,&m);k=sqrt(m);for(i=2;ik)printf(%d is a prime numbern,m);else printf(%d is not a prime numbern,

21、m);(13)输入两个正整数M和N，求其最大公约数和最小公倍数。#includevoid main()int p,r,n,m,temp;scanf(%d,%d,&n,&m);if(nm)temp=n;n=m;m=temp;p=n*m;while(m!=0)r=n%m;n=m;m=r;printf(%dn,n);printf(%dn,p/n);(14)输入一行字符，分别统计出其中英文字母，空格，数字和其他字符的个数。#includevoid main()char c;int letters=0,space=0,digit=0,other=0;printf(qing shu ru yi hang

22、zi fu:n);while(c=getchar()!=n)if(c=a&c=A&c=0&c=9)digit+;elseother+;printf(%d,%d,%d,%dn,letters,space,digit,other);(15)写一个函数，求两个整数中的较大者，用主函数调用这个函数，并输出结果，两个整数由键盘输入。#includevoid main()int max(int x,int y);int a,b,c;scanf(%d,%d,&a,&b);c=max(a,b);printf(max=%dn,c);int max(int x,int y)int z;if(xy) z=x;els

23、e z=y;return(z)(16)输出所有的水仙花数，是指一个3位数，其各位数字立方和等于概数本身#includevoid main()int i,j,k,n;printf(narcissus numbers are);for(n=100;n1000;n+)i=n/100;j=n/10-i*10;k=n%10;if (n=i*i*i+j*j*j+k*k*k)printf(%d,n);printf(n);(17)将一个二维数组行和列的元素互换，存到另一个二维数组中。#includevoid main()int a23=1,2,3,4,5,6;int b32,i,j;printf(array

24、a:n);for (i=0;i=1;i+)for (j=0;j=2;j+)printf(%5d,aij);bji=aij;printf(n);printf(array b:n);for (i=0;i=2;i+)for(j=0;j=1;j+)printf(%5d,bij)printf(n);(18)有一个3*4的矩阵，要求编程序求出其中值最大的那个元素的值，以及其所在的行号和列号。#includevoid main()int i,j,row=0,colum=0,max;int a34=1,2,3,4,9,8,7,6,-10,10,-5,2;max=a00;for (i=0;i=2;i+)for (j=0;jmax)max=aij;row=i;colum=j;printf(max=%d,row=%d,colum=%dn,max,row,colum);(19)将一个数组中的值按逆序重新存放。例如顺序为8 6 5 4 1.要求改为1 4 5 6 8#include#define N 5void main()int aN,i,temp;printf(enter array a:n);for (i=0;iN;i+)scanf(%d,%ai);printf(array a