C语言程序设计实验答案

1、-前言 -/* 非常感谢度娘以及各位网上C 语言高手的支持，才能让敝人完成此文档的整理。本文档集合了本人、度娘、众网友的力量，其中代码的正确率约为90%（不正确的有标注） 。为回报度娘及众网友的帮助，本文档免费下载。*/* 配“电子科技大学出版社（周信东主编）/* 努力吧，骚年以及学妹们！*/* 整理 edby 口玉刀一ofGUET.*/”的C 语言程序设计实验*/=实验一C 语言程序初步=1.-已知 a=5,b=4,c=6, 求出 s 并换行#include"stdio.h"main()int a,b,c,s;a=5;b=4;c=6;s=(a+b+c)/3;printf(

2、"a=%d,b=%d,c=%dn,s=%d",a,b,c,s);2.-输入一个数字求他的平方#include<stdio.h>main()int r,s;scanf("%d",&r);s=r*r;printf("s=%dn",s);3.-（ 1）#include<stdio.h>main()printf(" *n");printf("*n");printf(" *n");（ 2）#include<stdio.h>main()int

3、v;int a,b,c; /a,b,c aer sides,v is volume of cubea=3;b=3;c=5;v=a*b*c;printf("v=%dn",v);=实验二数据类型、运算符和表达式=1.（ 1） -/ 总觉得打印结果怪怪的，DO YOU THINK SO?main()char s1='3',s2='4',s3='5'int c1=101,c2=102;printf("3%ct4%ct5%cn",s1,s2,s3); /3%c为输出 3 和%cprintf("s1=%dts

4、2=%dts3=%dn",s1,s2,s3);/注意哦， s1,s2,s3 是 char! 而 %d：输入输出为整形%ld长整型短整型%hu 无符号整形%u %lu%s: 输入输出为字符串%c 字符 %f ：输入输出为浮点型%lf 双精度浮点型%hdprintf("c1=%dt%cn",c1,c1);/换码符't',表示水平制表位（horizeontal tab） ,它的作用是将光标移到最接近8 的倍数的位置printf("c2=%dt%cn",c2,c2); /注意c1,c2 的类型（ 2）/ 运行结果为 8.300000 %

5、是求余数 先运算 x-y ，把结果转换为 int 型的有利于四则运算main()float x=8.3,y=4.2,s;int a=7;s=x+a%5*(int)(x-y)%2/3;printf("s=%f",s);（ 3）main()int i,j,p,q;i=3;j=6;p=i+;q=-j;printf("%d,%d,%d,%dn",i,j,p,q);p=i-+3;q=+j-4;printf("%d,%d,%d,%d",i,j,p,q);（ 4）main()int m=15,n=9,s;m*=3+2;printf("%d

6、",m);n+=n-=n*=n;printf("%d",n);printf("%dn",(s=6*5,m+n+s);printf("%dn",s);2.-（ 1） #include<stdio.h>#define MM 40main()int a=3,b=6,t;t=MM/(3+6);printf("%d%d",t,MM);/ 原来 printf 语句打成了print ， printf 语句中少了一个%d.（ 2）#include<stdio.h>main()int m;doubl

7、e x;scanf("%d",&m);x=3.14*m*m;printf("%f",x);/ 注意分号， %f 转义（ 3）main()int m=8,n=5;printf("%d",m*=m-n);printf("%d,%d,%d",m=m+1,n-1,m+n);3.-main()int a=9,b=5;a+=b;b=a-b;a-=b;printf("%d%d",a,b);4.-/4.输入 a,b,c 三个变量，计算数学公式(a*b)/cmain()int a,b,d;float s,

8、c;scanf("%d%d%f",&a,&b,&c);d=a*b;s=d/c;printf("%f",s);=实验三顺序结构和输入输出方法=1.-（ 1） main()int m=345,t;float n=2.56;t=2.56*100;printf("m=%d,n*100=%dn",m,t);（ 2）main()int a,b,c,s,v;scanf("%d%d%d",&a,&b,&c);s=a*b;v=a*b*c;printf("%d,%d,%dn&q

9、uot;,a,b,c);printf("s=%d,v=%dn",s,v);2.-（ 1）main()int m,n;float x=3.5,y=6.2;scanf("%d,%d",&m,&n);printf("%6d,%6d",m,n); /*每个数的输出宽度为printf("x=%7.2f,y=%7.2f",x,y); /*个数的输出宽度6,两个数之间逗号建个。7,小数位 2*/*/（ 2）main()int a,b;long m,n;float p,q;scanf("a=%d,b=%d

10、n%f,%f",&a,&b,&p,&q);scanf("%ld",&m);scanf("%ld",&n);printf("a=%d,b=%dn m=%ld,n=%ldn",a,b,m,n);printf("p=%f,q=%fn",p,q);/ 打印结果有误！ ！3.-main()int i,j,k,ss,m=1,n=1;scanf("%d%d",&i,&j);m+=i+;n*=-j;ss=(k=m+2,n-5,k+n);p

11、rintf("%d",ss);4.-#include<stdio.h>main()char c1,c2;c1=getchar();c2=getchar();putchar(c1);putchar(c2);printf("c1=%c,c2=%c",c1,c2);printf("%d.%dn",c1,c2);5.-#include<stdio.h>main()int a=790,b,c;b=790/60;c=790%60;printf("%d小时 %d 分钟 ",b,c);6.-#include

12、<stdio.h>main()int a,b,c,d;scanf("%d%d%d",&a,&b,&c);d=a;a=c;c=b;b=d;printf("%d,%d,%dn",a,b,c);7.-#include<stdio.h>main()double a;scanf("%lf",&a);printf("%.2fn",a);=实验四逻辑运算判断选取控制=1.-1. a. 错误原因分析： Switch 分号错误switch(a*a+b*b)case 3:case

13、 1:y=a+b;break;case 0:y=b-a;break;b. 错误原因分析：switch 语句使用错误，后跟括号。Default放在后边。switch (a) case 10:y=a-b;break;case11:x=a*b;break; default:x=a+b;c. 错误原因分析：没有输出语句。switch(a+b)case 10:x=a+b;break;case 11:y=a-b;break;2.-（ 1）main ( )int x,y;scanf("%d",&x );if (x>-5&&x<0) y=x ;if (x

14、=0)y=x-1 ;if(x>0&&x<10) y=x+1;printf ("%d",y);(2)main()int x,y;scanf("%d",&x);if(x>-5)&&(x<0) y=x;elseif (x=0) y=x-1;else if(x>0&&x<10) y=x+1;printf("%d",y);3.-main ( )int a,M;scanf("%d",&a);M=a>0?a:-a;print

15、f("abs(a)=%d",M);4.-main()int c,t,m;printf("input the number of coat and trousers your want buy:n"); scanf("%d%d",&c,&t);if(c=t) if(c>=50) m=c*80; else m=c*90; else if(c>t)if(t>=50) m=t*80+(c-t)*60; else 90*t+(c-t)*60;elseif(c>=50) 80*t+(t-c)*45;else

16、 m=c*90+(t-c)*45;printf("%d",m);5.-#include<stdio.h>intmain(void)int a, b, c;scanf("%d%d%d",&a,&b,&c);if(a + b <= c | a + c <= b | b + c <= a)printf(" 不构成三角形n");else if (a = b && b = c)printf(" 等边三角形 n");else if (a = b | b =

17、c | a = c)printf(" 等腰三角形 n");elseprintf(" 不等边三角形n");return 0;6.-#include"stdio.h"main()long a;scanf("%ld",&a);if(a%5=0)if(a%7=0)printf("yesn|");else printf("non");=实验五循环结构=1.-#include"stdio.h"main()int n; while(1)printf("

18、Enter a number:"); scanf("%d",&n); if(n%2=1)printf("I said"); continue;break;printf("Thanks.Ineeded that!");2.-#include <stdio.h>main()int c;while ( (c=getchar () ) !='n')if ( (c<='X'&&c>='A'|c<='x'&&am

19、p;c>='a') )c += 2;else if (c='y'|c='Y'|c='z'|c='Z')c=c-24;printf("%c",c);putchar ('n') ;3.-#include<stdio.h>int main()int m, k;for( m = 1; m <= 4; m +)if ( m = 1 | m = 4 )for( k = 1; k <= 6; k+)printf("*");printf(&quo

20、t;n");elseprintf("*n");return 0;4.-#include<stdio.h>main()int a,b,c;printf("*123456789n");printf(" -n");for(a=1;a<=9;a+)printf("%3d",a);for(b=1;b<=a;b+)c=a*b;printf("%3d",c);printf("n");5.-#include<stdio.h>main()doubl

21、e e=2,w=0.000001,t;double n=1,s=1;t=1/w;while(s<t)s=s*(n+1);e=e+1/s;n+;printf("e=%lf,n=%dn",e,(int)(n-1);6.-#include <stdio.h>void main() int i,j,k=0,r,s=0,t=1000,a=0; for(i=2;i<=t;i+) a=0; r=0; for(j=1;j<i;j+) k=0; if(i%j=0) k=j; r+=k; if(r=i) a=r; if(a!=0)if(a=6)printf(&qu

22、ot;%d",a);elseprintf("+%d",a);s+=a;printf("=%dn",s);=实验六数组=1.-#include<stdio.h>main()int grade6;int i,mumber;for(i=1;i<=5;+i)gradei=0;printf("enter your numbern");for(i=1;i<=20;+i)scanf("%d",&mumber);if(!mumber) break;+grademumber;printf(&

23、quot;nnresult of searchn");printf("-n");for(i=1;i<=5;+i)printf("%4d%dn",i,gradei);2.-#include"stdio.h"main()int n,k,xx20;int i,j,t;printf("nPlease enter a number");scanf("%d",&n);printf("nPlease enter %d numbers:",n);for(i=0;i&l

24、t;n;i+) scanf("%d",&xxi);printf("%nPlease enter another number:");scanf("%d",&k);for(i=0;i<k;i+)t=xx0;for(j=1;j<n;j+)xxj-1=xxj;xxn-1=t;printf("nAfter moving:n");for(i=0;i<n;i+) printf("%3d",xxi);printf("n");3.-#include <

25、stdio.h>main()int i,a100=90,180,270,380,590,530,140,750,380,b6;for(i=0;i<6;i+)bi=0;for(i=0;i<9;i+)switch(ai/100)case 0:b0+;break;case 1:b1+;break;case 2:b2+;break;case 3:b3+;break;case 4:b4+;break;default :b5+;break;printf("The result is:");for(i=0;i<6;i+)printf("%d",

26、bi);printf("n");4.-#include <stdio.h>main()int i,j,t,p,q,s,n,a11=6,3,42,23,35,71,98,67,56,38;for(i=0;i<10;i+)for(j=i+1;j<10;j+)if(ai>aj)t=ai;ai=aj;aj=t;printf("%d ",ai);printf("ninput number:n");scanf("%d",&n);for(i=0;i<10;i+)if(n<ai)f

27、or(j=9;j>=i;j-)aj+1=aj;break;ai=n;for(i=0;i<=10;i+)printf("%d ",ai);printf("n");5.-#include<stdio.h>int main()char a100, b100;int i=0, j=0, n=0;gets(a);gets(b);while(aj!=0)while(aj+i=bi)&&bi!=0)i+;if(bi=0) n+;i=0;j+;printf("%d", n);=实验七字符处理=1.-该程序的功能

28、是：输入字符串，删除其中的数字，保留剩下的字符。#include<stdio.h>main()char a40,b40;int i,j;printf(" Enter the string: ") ;scanf("%s",a) ;i=j=0;while (ai!='0')if (! (ai>='0'&&ai<='9') )bj=ai;j+;+i;bj='0'printf (" %s",b) ;2.-#include "str

29、ing.h"#include "stdio.h"main()char str150="every one!"char str250="hello "strcpy(str2+strlen(str2),str1);printf("%s",str2);3.-/ 本代码有些奇怪，在有的 vc 上可以执行，有的却不行。#include "stdio.h"main()int i,pos;char str="This is a program"for(i=0;stri!='

30、;0'i+)if (stri='a') pos=i;break;printf("The position is %dn",pos);4.-#include "stdio.h"main()int i,pos;char str="This is a program"for(i=0;stri!='0'i+)if (stri='a') pos=i;break;printf("The position is %dn",pos);程序运行结果如下图所示：5.-#inclu

31、de "stdio.h"main()int i,j,k=0;char s255;while(sk=getchar()!='') k+;for(j=0;sj!=''j+)if(sj<='Z'&&sj>='A') sj+=32;if(sj<='w'&&sj>='a')sj+=3;else if(sj='x'|sj='y'|sj='z') sj-=23;printf(" 译

32、码后结果 :");for(i=0;si!=''i+)printf("%c",si);printf("n");getchar();6.-#include "stdio.h"main()int i=0;char str1255,str2255;printf("n Input string 1:");scanf("%s",str1);printf("n Input string 2:");scanf("%s",str2);while(1

33、)if(str1i=str2i)i+; continue;elsebreak;printf("n%dn",str1i-str2i);=实验八函数=8.1 未成功int a=3,b=5;max(int a,int b)int c;c=a>b?a:b;return (c);main()extern int a,b;printf("%dn",max(a,b);8.2#include <stdio.h>int is_prime(int m)int i;if(m=1)return 0;for(i=2;i<m;i+)if(m%i=0)retu

34、rn 0;return 1;void main()int n,c;scanf("%d",&n);c=is_prime(n);if(c=1)printf("primen");elseprintf("not primen");8.3#include<stdio.h>int main()int m,n,i,sum=1,t;printf(" 请输入 m 的值： n");scanf("%d",&m);printf(" 请输入 n 的值 :n");scanf(

35、"%d",&n);if(m<n)t=m;m=n;n=t;for(i=m;i>=m-n+1;i-)sum*=i;for(i=1;i<=n;i+)sum/=i;printf(" 值为 :%dn",sum);=实验九指针=1./ 在每句 for (j = 0; j < 12; j+)前都加上p = a;这句/ 将 if (j % 4 = 0)改为if (j + 1) % 4 = 0)/ 调试后的程序是 : #include<stdio.h> void main( )int j, k, a12, *p;p = a;for (j = 0; j < 12; j+)scanf("%d", p+);p = a;for (j = 0; j < 12; j+)printf("%d", *p+);if (j+1) % 4 = 0)printf("n");2.#include<stdio.h>void main()void swap(int