C语言程序设计(张淑华、朱丽莉版)课后习题参考答案.docVIP

C语言程序设计（张淑华、朱丽莉主编）课后习题解答（仅供参考）习 题 一一、选择题1B 2D 3B 4A 5B6C 7C二、填空题1.obj 2函数 3/* */ 4#include int a,b; a,b 三、简答题(略) 习 题 二一、选择题1B 2B 3A 4D 5A6C 7C 8A 9C 10B11A 12A 13C 14A 15C二、填空题1变量 2存储数据的单元 3非0、0 4(1)a=0 (2)051 61 7-30 838 94 , 710-6 177772 119.9 127 三、写出下列程序的运行结果10，0，5 218 364 512 8 455d4,c四、编程题1#include #define PI 3.1415926 void main() float r,s; printf(“Please input circinal radiin”); scanf(“%f”,&r); s=PI*r*r; printf(“r=%.2f,s=%.2fn”,r,s); 2#include void main() char c1,c2; printf(“Please input a majusculen”); scanf(“%c”,&c1); c2=c1A&c1Z?c1+32:c1; printf(“%cn”,c2); 3#include void main() int a=0,b; scanf(“%c”,&b); b=b&a; printf(“b=%dn”,b); 习 题 三一、选择题1C 2C 3A 4C 5D6原题第2行应为 c=(c-=a-5),(a=b,b+3); 答案为B 否则输出结果为5,0,57D 8C 9A 10B 二、填空题1-50 300、a=-50,b=300 a=-50 b=300210 20 30、10,20,30、a=10,b=20,c=30315、0、0三、写出下列程序的运行结果1a=789.654321,a= 789.65,a= 789.65432100,a=789.6543212b=15,b=17,b=f 3c=1,x=0,y=0,z=1 421 20,205在TC环境下为216,125 在VC环境下为 216,1806a=A,b=d,c=F 79,4,12,12 8x=4.500000,y=4,x+y=8.500000四、编程题1#include void main() printf(*n); printf( HAPPY NEW YEAR! n); printf(*n); 2 (1) #include void main() int a=5,b=8,c=10,m,max; m= ab?a:b; max=cm?c:m; printf(“max=%dn”,max); (2)#include void main() int a,b,c,m,max; scanf(%d,%d,%d,&a,&b,&c); max=ab?a:(bc?b:c); printf(“max=%dn”,max); 习 题 四一、选择题1D 2D 3C 4A 5D6A 7C 8C 9D 10B二、填空题16、5、5 2(a%3=0|a%7=0) 3(1) ab (2) a=c; (3) a,b,c三、写出下列程序的运行结果14 264 3a=7,b=4 446 46 5*# 46四、编程题1另见填空题3 #include void main() float a,b,c,t; scanf(%f,%f,%f,&a,&b,&c); if (ab) t=a;a=b;b=t; if (ac) t=a;a=c;c=t; if (bc) t=b;b=c;c=t; printf(“%.2f,%.2f,%.2fn”,a,b,c); 2#include void main() int a,b; scanf(%d,%d,&a,&b); if(a%b=0) printf(“%d is divisible by %dn”,a,b); else printf(“%d is not divisible by %dn”,a,b); 3(1) #include void main() int x,y; scanf(“%d”,&x); if (x-5&x0&x10) y=x+1; printf(y=%dn,y); else printf(Data out of rangen); (2) #include void main() int x,y; scanf(“%d”,&x); switch(x) case -1: case -2: case -3: case -4:y=x; printf(y=%dn,y);break; case 0:y=x-1; printf(y=%dn,y);break; case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: case 9:y=x+1; printf(y=%dn,y);break; default: printf(Data out of rangen); 4#include void main() long num; int indiv,ten,hundred,thousand,tenthousand,place; /*分别代表个位、十位、百位、千位、万位和位数*/ printf(“Please Input a integer(099999):”); scanf(“%ld”,&num); if (num9999) place=5; else if (num999) place=4; else if (num99) place=3; else if (num9) place=2; else place=1; printf(“place=%dn”,place); printf(“For each digit:”); tenthousand=num/10000; thousand=(int)(num-tenthousand*10000)/1000; hundred=(int)(num-tenthousand*10000-thousand*1000)/100; ten=(int)(num-tenthousand*10000-thousand*1000-hundred*100)/10; indiv=(int)(num-tenthousand*10000-thousand*1000-hundred*100-ten*10); switch(place) case 1:printf(“%d”,indiv);break; case 2:printf(“%d,%d”,ten,indiv);break; case 3:printf(“%d,%d,%d”,hundred,ten,indiv);break; case 4:printf(“%d,%d,%d,%d”,thousand,hundred,ten,indiv);break; case 5:printf(“%d,%d,%d,%d,%d”,tenthousand,thousand,hundred,ten,indiv); 习 题 五一、选择题1D 2C 3D 4B 5C6B 7C 8B 9B 10B二、填空题1(1) x=0 或 !(x0) (2) xamin2(1) i10 或 i=9 (2）j%3 或 j%3!=03(1) pi (2) fabs(t) (3)4三、写出下列程序的运行结果11 2y=-1 34 4a=2,b=8 5*7645 71 8s=0 34 23四、编程题1#include void main() int i,j,k;for (i=1;i=4;i+) /*输出上面4行*号*/ for (j=1;j=5-i;j+) printf(“ “); /*输出*号前面的空格*/ for (k=1;k=2*i-1;k+) printf(“*”); /*输出*号*/ printf(“n”); /*输出完一行*号后换行*/ 2 #include stdio.hvoid main() int num,n1,n2,p=1; scanf(%d,&num);while (num) n1=num/10; n2=num%10; p*=n2; num=n1; printf(num=%d,p=%dn,num,p);3 #include stdio.hvoid main() int i; float s1,s2,s3,s4,s5,sum,avg; for(i=1;i=0 4(1) 0 (2) 65(1) gets(temp); (2) strcpy(temp,str); 6(1) i=48 & si=0 & si=9 (2) dj=0; 或dj=0;三、写出下列程序的运行结果113715 2s=15 358 411 57 06how 7max=9,row=1,col=0 86,4,3,2, are you? I am fine四、编程题1#include #define N 10 void main() int a32,x,k,r,i; printf(“Please input an integer:); k=-1; do r=x%2; a+k=r; x/=2; while(x=1); for(i=k;i=0;i-)printf(“%1d”,ai);printf(“n”); 2#include #define N 10 void main() int aN+1=10,20,30,40,50,60,70,80,90,100; int t1,t2,num,i,j; printf(“array a:n”);for (i=0;iaN-1) aN=num; else for (i=0;inum) t1=ai; ai=num; for (j=i+1;jN+1;j+) t2=aj;aj=t1;t1=t2; break; printf(Current array a:n”);for (i=0;iN+1;i+)printf(“%5dn”,ai);3#include #define N 6 void main() int i,j,aNN;for (i=1;iN;i+) aii=1;ai1=1;for (i=3;iN;i+)for (j=2;ji-1;j+) aij=ai-1j-1+ai-1j;for (i=1;iN;i+) for (j=1;j=i;j+) printf(“%5d ”,aij); printf(”n”); 4 #include stdio.h void main() char s80,t80,d; int i,j; printf(Please enter a string:n); gets(s); printf(delete?n); d=getchar(); for(i=j=0;si!=0;i+) if(si!=d) tj=si;j+; tj=0; printf(%sn,t); 5#include stdio.h #define N 8 void main() int sN3,i,j,k,m,t1; float aN,sum,t2; for(i=0;iN;i+) printf(Please enter the %d-th three subjects scoren,i); sum=0; for(j=0;j3;j+) scanf(%d,&sij); sum+=sij; ai=sum/3; for(i=0;iN-1;i+) k=i; for(j=i+1;jN;j+) if(akaj) k=j; if(k!=i) for(m=0;m3;m+) t1=sim;sim=skm;skm=t1; /*交换整行的值*/ t2=ai;ai=ak;ak=t2; for(i=0;iN;i+) printf(%d-th ,i); for(j=0;jN;j+) printf(%d ,sij); printf(%.2fn,ai); 习 题 七一、选择题1C 2A 3B 4B 5A6D 7C 8D 9C 10C二、填空题1struct STRU t20; 2x.x、x.y、x.z.y、x.z.z 34,8三、写出下列程序的运行结果16 20 34E5S 421 5Zhao,m,85,90四、编程题1#include stdio.h #define N 45 struct student char name20; char sex7; int age; int score; stdN; void main() int i,max=0,rowi; for(i=0;iN;i+) printf(Please enter the data of the %d-th student:n,i); printf(name:); scanf(%s,); printf(sex:); scanf(%s,stdi.sex); printf(age:); scanf(%d,&stdi.age); printf(score:); scanf(%d,&stdi.score); if(maxstdi.score) max=stdi.score; rowi=i; printf(name:%s ,); printf(sex:%s ,stdrowi.sex); printf(age:%d ,stdrowi.age); printf(score:%dn,stdrowi.score); 2#include stdio.h #define N 5 struct student char name20; char sex7; int score;stdN;void main() int i,ml=0,fml=0; float sum=0,avg; for(i=0;iN;i+) printf(Please enter the data of the %d-th student:n,i); printf(name:); scanf(%s,); printf(sex:); scanf(%s,stdi.sex); if(stdi.sex0=m|stdi.sex0=M) ml+=1; else fml+=1; printf(score:); scanf(%d,&stdi.score); sum+=stdi.score; avg=sum/N; printf(The number of male students:%dn,ml); printf(The number of female students are:%dn,fml); printf(The average scores are:%.2fn,avg);习 题 八一、选择题1A 2C 3D 4A 5C 6A 7D 二、填空题1(1) high=mid-1 (2) low=mid+1 2(1) int m (2) m%i=0 (3) return s3(1) max=xij (2) max三、写出下列程序的运行结果1625 2Qian,p,95,92 32 412 5h=8四、编程题1#include stdio.h void main() int prime(int); int x; printf(nPlease input an integer:); scanf(%d,&x); if(prime(x) printf(n%d is prime.n,x); else printf(n%d is not prime.n,x); int prime(int n) int flag=1,i; for(i=2;i=n-1 & flag=1;i+) if(n%i=0) flag=0; return(flag); 2#include stdio.h void delask(char a) int i,j; char b80; for(i=j=0;ai!=0;i+) if(ai!=*) while(ai!=0) bj=ai; j+; i+;break; bj=0; for(i=0;bi!=0;i+) ai=bi; ai=0; void main() char s80; printf(Please enter a string:n); scanf(%s,s); delask(s); printf(%sn,s); 3#include stdio.h struct date int day; int month; int year; ; int days(struct date dt) int y,m,d,ds12=31,28,31,30,31,30,31,31,30,31,30,31,i,s=0; y=dt.year; m=dt.month; d=dt.day; if(y%4=0 & y%100!=0|y%400=0) ds1=29; /* 计算每月的天数是本年第几天 */ switch(m) case 1:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 2:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 3:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 4:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 5:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 6:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 7:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 8:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 9:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 10:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 11:for(i=0;im-1;i+)s+=dsi; s+=d; break; case 12:for(i=0;im-1;i+)s+=dsi; s+=d; break; return (s); void main() struct date ymd; int dys; printf(Input year month and dayn); scanf(%d,%d,%d,&ymd.year,&ymd.month,&ymd.day); dys=days(ymd); printf(Today is the first %d days in the middle of this year.n,dys); 习 题 九一、选择题1A 2D 3A 4 D 5B 6A 二、写出下列程序的运行结果110 29 11 11 3* 412 586 1 1 1 2 1 3三、编程题1#include stdio.h #define N 10 float fmax=0,fmin=0; float average(float fscore,int n) int i; float faver,fsum=fscore0; fmax=fmin=fscore0; for(i=1;ifmax) fmax=fscorei; else if(fscoreifmin) fmin=fscorei; fsum+=fscorei; faver=fsum/n; return (faver); void main() float fave,fnumbN; int i; for(i=0;i=a & c=A & cc & a+cb & b+ca) printf(%.2fn,AREA(a,b,c); else printf(It is not a triangle!n); 习 题 十一、选择题1B 2D 3D 4D 5C6A 7A 8C 9D 10A11A 12B 13C 14A 15C二、写出下列程序的运行结果12 1 20 34 89 310 48 4 35CBADGFE 630,30 7The data: 84 4 4 45 6 7 8 9 10 i=5 c=B三、编程题1#include #include void fun(char *s,int *a,int *b) while(*s!=0) if(*s=65 & *s=97 & *s=122) *b+=1; /* 可用 (*b)+; */ s+; void main() char s100; int upper=0,lower=0; printf(请输入一串字符：n); gets(s); fun(s,&upper,&lower); printf(upper=%d,lower=%dn,upper,lower); 2#include void fun(int *p1,int *p2) int p; p=*p1; *p1=*p2; *p2=p; void main() in