c语言简单实例

1、1编程1.1 打印出以下图案* * * * * * * * *#include<stdio. h>void main()(int i, j, k;for(i=0;i<=3;i+) for(j=0;j<=2-j;j+) printfC ");for(k=0;k<=2*i;k+)printf ("*");printf("n"); for(i=0;i<=2;i+) for (j=O;j<=i;j+) printfC "); for (k=0; k<=4-2*i;k+)printf("

2、*"); printf("nn);)1.2编写程序实现输入整数n,输出如下所示由数字组成的菱形。(图中n=5) 11 2 11 2 3 2 11 2 3 4 3 2 11 2 3 4 5 4 3 2 11 2 3 4 3 2 11 2 3 2 1 1#include<stdio. h> void main() (int i. j; printf("n"); for(i=1;i<=5;i+)for(j=1;j<=i;j+) printf(n%2dn, j); for (j=i-1; j>=1; j") printf(

3、"%2d", j); printf("n");)for(i=4;i>=1;i-)(for(j=1;j<=i J+) printf(n%2dM, j); for (j=i-1; j>=1; j) printf ("%2d", j); printf ("n");)2.1打印以下图案：* * * * *#include<stdio. h>void main()(char =int ijk;char space=''for(i=0;i<=5;i+)(printf (&qu

4、ot;n"); for(j=1;j<=3*i;j+) pr intf (n%1cn, space);for(k=0;k<=5;k+) printf (n%3c", ak);)1.2输入4X4的数组，编写程序实现：(1)求出对角线上各元素的和；求出对角线上行、列下标均为偶数的各元素的积；(3)找出对角线上其值最大的元素和它在数组中的位置。# i ncIude<stdio. h>void main()(fl oat a44, sum=0, sum1=1, max;int i, j, b;printf("please input number:n

5、n);for(i=0;i<4;i+)for (j=O;j<4;j+)scanf("%fn,&aij);for(i=0;i<4;i+)sum=sum+aii;pr intf ("sum=%6. 2fn", sum);for(i=0;i<4;i+)i f (i %2=0) sum1=sum1 *a i i ;printf ("sum1=%6. 2f", sum1);max=a0 0;b=0;for(i=1;i<4;i+)if (max<aii) max=ai i;b=i；)pr intf (nmax=%6

6、. 2f, %d”，max, b);1.1 写一函数，输入一个4位数字，要求输出这4个数字字符，但每两个数字 间空一个空格。如输入1990,应输出“1 口 9 口 9 口 0" o#include<stdio. h>void main()(char str 80;printfC"input four number:n,f);scanf str);insert (str); void insert (str) char str ;(int i;for(i=strlen(str); i>0; i-) str2*i=stri;str2*i-1=')pri

7、ntf(nn result:n %sn,str);1.2 用递归法将一个整数n转换成字符串。例如，输入483,应输出字符串 “483”。n的位数不确定，可以是任意位数的整#incIude<stdio. h>void convert(n)int n;int i; if (i=n/10) !=0 convert(i);putchar (n%10+'0');)void main()(int number;printf (n input number:nn); scanf(n%dHf &number);printf (nn result:11);if (number

8、<0) putchar (f-f); number=-number; convert(number);)1.1 编一程序，输入月份号，输出该月的英文月名。例如，输入“3”,则输出 “March"，要求用指针数组处理。#include<stdio. h>#include<str i ng. h>void main()(stat i cchar*month-name13 = M i11 eagemonth"January"，"February", "march", "Apr i I&quo

9、t;, "May", "June”，July", "August:"September", "October"，"November"，"December"int n;printf (nplease input month:");scanf("%d",&n);if(n<=12)&&(n>=1)printf (H%d month is engIish:%swf nf *(month_name+n);els

10、epr intf ("no %d monthn, n);)1.2 有一字符串，包含n个字符。写一函数，将此字符串中从第m个字符开始 的全部字符复制成为另一个字符串。#incIude<stdio. h>#include<str i ng. h>void main()(int m;char *str120, *str220;printf (nplease input string:"); scanf ("Xs", str1);printf("input number:");scanf (n%dM, &m);if (str I en (str1)<m) pr intf ("error!H);else(copystr (str1, str2, m)