《C语言程序设计实验与习题》上机实.doc

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1、C语言程序设计实验与习题上机实验参考答案（此答案仅作为教师指导学生上机实验时参考使用，不得转发给学生！）第2章实验一 基本数据类型1、float c;double d; c=211.5f; d=211.5; printf(a/b=%dn,a/b);2、printf(%d,%o,%xn,0x65,0x65,0x65);3、e=o+2;f=m+2;g=e+2;4、ra=de*PI/180;实验二 算术运算符和表达式1、printf(%fn,x+a%3*(int)(x+y)%2/4);printf(%fn,(float)(a+b)/2+(int)x%(int)y);2、printf(%dn,(x=1

2、,y=100,z=(x+y)*5);printf(%dn,x=(i=10,j=5,i*j);printf(%dn,(x=i=10,j=5,i*j);3、 double a,b,c,s,area; area=sqrt(s*(s-a)*(s-b)*(s-c);第3章实验一 数据的格式化输出略实验二 数据的格式化输入1、 a=b;B=g;2、10V12V410.343、 a=3Vb=7x=8.57Vy=71.82c1=AVc2=a 4、略第4章实验一 if语句2、wan=ge&qian=shi3、c=a&c=A&c=0&c=94、#include #include void main ( ) dou

3、ble x, y, z; printf(输入x,y的值: n); scanf(%f%f, &x，&y ); if ( x = 0&y=0 ) z = log10(x)+log10(y); else if ( x = 0 ) z = sin(x)+cos(y); else if ( x 0&y 0 ) z = exp(2*x)+exp(2*y); else z = tan(x+y); printf(Z=%.2fn, z ); 实验二 switch语句2、#include void main()float m,y,s;printf(“请输入本金和存款年限:n”);scanf(%f%f,&m,&y)

4、;if(y8) n=y-8; y=8;switch(y)case 1: s = m + m * 0.63% * 12; break;case 2: s = m + m * 0.66% * 12 * 2; break;case 3: case 4: s = m + m * 0.69% * 12 * y; break;case 5: case 6: case 7: s = m + m * 0.75% * 12 * y; break;case 8: s = m + m * 0.84% * (y+n); break;defaut:printf(wrongn); printf(“本金利息合计: %fn”

5、,s);第5章实验一 循环语句的使用1、temp =m;m=n;n=temp; m=n;n=r2、tn=tn+a; a=a*10；3、【程序如下：】#include void main() float s,f0,h,x; int n,i; printf(“输入区间分隔数n:”); scanf(“%d”,&n); h=1.0/n; f0=4.0; /初值，x=0.0时f(0.0)=4.0s=0.0; for(i=1;in;i+) s+=f0*h; x=i*h; f0=4/(1+x*x); printf(“s=%fn”,s); 实验二 循环的嵌套1、【程序如下：】#include #include

6、 void main() long int sum,temp; int n,i,j=1; printf(“Please input how many terms you want the computer to calculate(19):n”); scanf(“%d”,&n); if(n=10) printf(“Overflow !n”); exit(0); sum=0; for(i=1;i=4)3、【程序如下：】#include void main()int m,i,s;for ( m=2;m=1000;m+) t=0;for (n=1;n=m/2;n+)if ( m%n=0 ) t+=n

7、;if (m=t) printf(“%6d”,m);printf(“n);4、【程序如下：】#include void main() int x,y,z; for(x=0;x=3;x+) for(y=1;y=5;y+) for(z=0;z=6;z+) if (x+y+z=8) printf(“x=%d,y=%d,z=%d”,x,y,z);5、if (x/y=s) t+=10；实验三 continue 语句和break1、x=10 y=62、a=12 y=12 a=16 y=283、a=84、k=45、money10000 break第6章实验一 一维数组1、mid=(low+high)/2;

8、if(x=amid) printf(%d,mid);break; else if(xamid) high=mid-1; else low=mid+1;2、for(i=0;iN;i+) for(j=0;jaj+1) temp=aj; aj=aj+1; aj+1=temp;3、scanf(%d,&base);for(i=0;n!=0;i+) numi=n%base; n=n/base; printf(the result is:);for(i-;i=0;i-)if(numi=0&numi=9) c=0+numi; else c=a+numi-10; printf(%c,c);实验二 二维数组1、

9、int cur_i=0, cur_j; int count, size=0, i, j; while(size%2)=0) printf(n enter square size(ODD number):); scanf(%d,&size); cur_j=(size-1)/2; for(count=1;count=size*size;count+) magiccur_icur_j=count; if(count%size)=0) cur_i+;continue; cur_i-; cur_j+; if(cur_i0) cur_i+=size; else if(cur_j=size) cur_j-=

10、size; for(i=0;isize;i+) printf(n); for(j=0;jsize;j+) printf(%4d,magicij); 2、for(i=0;i10;i+)ai0=1;aii=1;for(i=2;i10;i+)for(j=1;ji;j+)aij=ai-1j-1+ai-1j;3、 int i,j,high=1,low=1,sh,sl;printf(input score:n);for(i=1;i5;i+)for(j=1;j100|scoreij0) printf(输入成绩应在0100之间，请重新输入：n); scanf(%d,&scoreij); for(i=1;i5;

11、i+)sumi=0;for(j=1;j7;j+)sumi+=scoreij;averi=sumi/6;sh=sl=sum1;for(i=2;ish) sh=sumi;high=i; else if(sumisl) sl=sumi;low=i;printf(%d总分最高,n%d总分最低n,high,low);printf(请输入学生学号：);scanf(%d,&i);while(i4) printf(请重新输入：n);scanf(%d,&i);for(j=1;j7;j+) printf(第%d次考试成绩为:%d,n,j,scoreij);printf(平均成绩为:%dn,averi);print

12、f(请输入考试次数:);scanf(%d,&j);while(j6) printf(请重新输入：n);scanf(%d,&j);aver0=0;for(i=1;i=a&chi=A&chi=0&chi*p2) *m=*p1; *n=*p2; else *m=*p2; *n=*p1; if(*m*p3) *n=*p3;3、switch(c)case u: *(unsigned *)p3)=*(unsigned *)p1);*(unsigned *)p1)=*(unsigned *)p2);*(unsigned *)p2)=*(unsigned *)p3);break; case i: *(int

13、*)p3)=*(int *)p1);*(int *)p1)=*(int *)p2);*(int *)p2)=*(int *)p3);break; case f: *(float *)p3)=*(float *)p1);*(float *)p1)=*(float *)p2);*(float *)p2)=*(float *)p3);break; case d: *(double *)p3)=*(double *)p1);*(double *)p1)=*(double *)p2);*(double *)p2)=*(double *)p3);break; case c: *(char *)p3)=*(

14、char *)p1);*(char *)p1)=*(char *)p2);*(char *)p2)=*(char *)p3); 实验二 指针与数组1、while(pq) t=*p; *p=*q; *q=t; p+; q-;2、scorei=max=*(*a+i);for(p=a+1;pa+N;p+)scorei+=*(*p+i);if(max*(*p+i)max=*(*p+i);3、int *p,count=0,t;while(count=a;p-)*(p+1)=*p;*a=t;count+;实验三 指针数组与指向指针的指针1、for(i=1;i5;i+) for(j=0;j*p0) p0=&

15、aij;else for(m=4;m=1;m-) if(aij*pm) for(n=1;nm;n+) pn=pn+1;pm=&aij;break;2、for(p=pa;ppa+M;p+)for(i=0;iN-1;i+)for(j=0;jN-i-1;j+)if(*(*p+j)*(*p+j+1)t=*(*p+j);*(*p+j)=*(*p+j+1);*(*p+j+1)=t;实验四 指针与函数1、第一处：switch(op) case +:func=add;break; case -:func=sub;break; case *:func=mul;break; case /:func=div;bre

16、ak; default: done=0;第二处：printf(%f%c%f=%fn,op1,op,op2,(*func)(op1,op2);2、第一处：return (*func)(a,b);第二处：switch(op)case +:result=compute(add,op1,op2);break;case -:result=compute(sub,op1,op2);break;case *:result=compute(mul,op1,op2);break;case /:result=compute(div,op1,op2);break;default: done=0;3、int i;*p

17、=0;for(i=1;i*(a+*p) *p=i;return a+*p;第9章实验一 字符数组1、for(j=0;j=A&aij=a&aij=0&aij0)sj-1=s0;for(j=1;sj!=0;j+) sj-1=sj;i-;sj-1=0;3、for(len=0;silen!=0;len+);half=len/2;for(j=0;jhalf-1;j+)for(k=j+1;khalf;k+)if(sijsik)ch=sij;sij=sik;sik=ch;if(len%2) half+;for(j=half;jlen-1;j+)for(k=j+1;ksik)ch=sij;sij=sik;si

18、k=ch;实验二 字符串指针变量1、for(p=str;*p!=0;p+)if(*p= ) word=0;else if(word=0)word=1;if(*p=a&*p=z) *p-=32;2、char ch=*s,*p=s;if(ch!=0)for(;*(s+1)!=0;s+) *s+=*(s+1);*s+=ch;for(;p=0&*s=9)find=1; *p=*p*10+*s-48;else if(find)find=0; p+; num+;if(find) num+;return num;实验三 字符串处理函数1、for(s=str;*s= &*s!=0;s+);strcpy(str

19、,s);if(*s!=0)for(s=str+strlen(str)-1;*s= ;s-);*(s+1)=0;2、for(p=str;pstr+4;p+)for(q=p+1;qstr+5;q+)if(strcmp(*p,*q)=1)s=*p;*p=*q;*q=s;第10章实验一 结构体1、在VC中的运行结果（以下同）The size of int is 4.The size of char is 1.The size of float is 4.The size of struct Student is 40.The size of s is 40.2、for (i = 0; i N; i+)

20、 if (xuehao = stui.number) l = i;break;if (l != -1) printf(%ld %s %c %6.2f %6.2f %6.2f %6.2fn,stul.number, stul.name, stul.sex, stui.score0 , stui.score1 , stui.score2, stul.aver);elseprintf(The searched student is not existent!n);3、#include #define N 10struct Book char name40; float price;void sort

21、(struct Book b, int n);void main( ) struct Book bN; int i;printf(Please input %d books information as follow: n, N);printf(Name Pricen);for (i = 0; i N; i+) printf(Please input %dth books information: n, i+1);scanf(%s%f, bi.name, &bi.price);sort(b, N);for (i = 0; i N; i+) printf(%s %6.2fn, bi.name,

22、bi.price);void sort(struct Book b, int n)struct Book k; int i, j;for (i = 0; i N-1; i+)for(j = 0; j bj+1.price) k = bj; bj = bj+1; bj+1 = k; 实验二 共用体1、The size of int is 4.The size of char is 1.The size of float is 4.The size of union U_value is 4.The size of u1 is 4.The value of u1.iv is 100The valu

23、e of u1.cv is dThe value of u1.fv is 0.The size of u2 is 4.The value of u2.iv is -The value of u2.cv is AThe value of u2.fv is -.The size of u3 is 4.The value of u3.iv is The value of u3.cv is ?The value of u3.fv is 3.2、#include #define N 10union Categorylong stu_class; char tea_position20; ;struct

24、Personlong id;char name16;char sex;int age;char flag; union Category cp;void main( )struct Person stN;int i;printf(Please input %d persons information as follow: n, N);printf(Id Name Sex Age Flag n);for (i = 0; i N; i+)printf(Please input %dth persons information: n, i+1);scanf(%ld%s%*c%c%*c%d%*c%c,

25、 &sti.id, sti.name, &sti.sex, &sti.age, &sti.flag);if (sti.flag = S)printf(Please input the students class information: );scanf(%ld, &sti.cp.stu_class);else if (sti.flag = T)printf(Please input the teachers position information: );scanf(%s, sti.cp.tea_position);elseprintf(Input Error!n);printf(nId N

26、ame Sex Age Flag class/positionn);for (i = 0; i 20)printf(%-10ld%-17s%-4c%-4d%-5c%-22ldn, sti.id, sti.name, sti.sex, sti.age, sti.flag, sti.cp.stu_class);else if (sti.flag = T & sti.age next = NULL;ptr = tail;printf(nplease input 5 data:n);for(i = 0; i data = num;head = (struct list *)malloc(sizeof(

27、struct list);head-next = ptr;ptr = head;ptr = ptr-next;while(ptr != NULL) printf(The value is: %dn, ptr-data);ptr = ptr-next;实验四 枚举1、if (i != j) & (i != k) & (j != k) )show(i);show(j);show(k);printf(n);第11章实验一 宏定义和文件包含1、略2、略3、（1）ex1101.h#define f1(a, b) a*b#define f2(c, d) (c)*(d)#define f3(x, y, z)

28、 (z=x, x=y, y=z)（2）#include #include ex1101.hvoid main()int a, b, c;double f, g, h;scanf(%d%d, &a, &b);scanf(%lf%lf, &f, &g);f3(a, b , c);f3(f, g, h);printf(a=%d, b=%dn, a, b);printf(f=%f, g=%fn, f, g);实验二 条件编译1、略2、略3、#include #define UPPERCASE#define ISLOWER(c) (c=a&c=z?1:0)#define TOUPPER(c) (c-32

29、)void main()char str81;int i;gets(str);for (i=0; stri!=0; i+)#ifdef UPPERCASEif (ISLOWER(stri)stri = TOUPPER(stri);#endifputchar(stri);putchar(n);第12章实验一 位运算符1、#include void main()char str81;int i, key;printf(请输入一个字符串：n);gets(str);printf(请输入一个整数作为密码：n);scanf(%d, &key);/* 开始加密 */for (i=0; stri!=0; i+

30、)stri = key;printf(加密完成！密文如下：n);puts(str);printf(请输入解密用的密码：n);scanf(%d, &key);/* 开始解密 */for (i=0; stri!=0; i+)stri = key;printf(解密完成！结果如下：n);puts(str);2、#include unsigned rotate(unsigned v, int n)unsigned h, l, r;int size = sizeof(unsigned)*8;if (n0)h = vn;r = h|l;elsen = -n;h = v(size-n);r = h|l;re

31、turn r;void main()unsigned x, y;int n;scanf(%x%d, &x, &n);printf(%#xn, x);y = rotate(x, n);printf(%#xn, y);实验二 位段1、void showFont()printf(n);printf(%d;, myfont.fontid);printf(%d;, myfont.fontsize);printf(%d;, myfont.bold);printf(%d;, myfont.italic);printf(%d;, myfont.underline);printf(n);void changeF

32、ontsize()unsigned newsize;printf(输入字体尺寸（0127）：);scanf(%u, &newsize);myfont.fontsize = newsize;void toggleItalic()myfont.italic = myfont.italic;void toggleUnderline()myfont.underline = myfont.underline;2、#include /* 定义结构体用来保存员工信息 */typedef structunsigned id:16;unsigned status:1;unsigned wagetype:1; Employee;void main()/* 定义数组employee保存5位员工的信息 */Employee employee5;unsigned short id;char i;/* 输入5位员工的信息 */for(i=0; i5; i+)printf(输入第%d位员工的信息：n, i+1);printf(员工编号：);scanf(%d, &id);employeei.id = id;getchar();printf(在职？(y/n);if (getchar()=y)employeei.status = 1;elseemplo