C语言程序设计教程习题答案.doc

第二章1.单项选择CBCCC CDCDC DBB2.填空题（1）1（2）26（3）6，4，2（4）10，6（5）3.000000（6）double (7)9 (8)字母，数字，下划线（9）13.700000（10）11（12）0（13）10，9，11（15）(x0&y0)|(x0&z0)|(y0|z0) （16）double（17）x=0（18）sqrt(fabs(a-b)/(3*(a+b) （19）sqrt(x*x+y*y)/(a+b)第三章1.单项选择CCCDD BCDBC BCBBB A2.填空题（1）用；表示结束（2） （3）y=x0?1:x=0?0:-1（4）y%4=0&y%100!=0|y%400=0（5）上面未配对（6）default标号（7）while， do while， for（8）do while（9）本次（10）本层3阅读程序，指出结果（1）yes（2）*&（3）ABother（4）2870（5）2，0（6）8（7）36（8）1（9）3，1，-1，3，1，-1（10）a=12，y=12（11）i=6，k=4（12）1，-24程序填空（1）x：y，u:z（2）m=n，m！=0，m=m/10（3）t=0，sgmin，5.编程题（1）#include int main() double x , y;scanf(%lf,&x);if(x=1.0&x10)y=2*x-11;elsey=3*x-11;printf(%lfn,y);return 0;(2 )#include int main()double x,y,z,min;scanf(%lf%lf%lf,&x,&y,&z);if(xy)min=y;elsemin=x;if(minz)min=z;printf(min=%lfn,min);return 0;(3) #include int main()int y,m,d,flag,s=0,w,i;scanf(%d%d%d,&y,&m,&d);flag=(y%4=0&y%100!=0|y%400=0);w=(y-1)*365+(y-1)/4-(y-1)/100+(y-1)/400)%7;for(i=1;i2)s=s+1;s=(w+s)%7;if(s=0)printf(星期日n);elseprintf(星期%dn,s);return 0; (4)#include int main()float p,r;scanf(%f,&p);if(p10&p20&p40&p60&p100)r=10*0.1+10*0.075+20*0.05+20*0.03+40*0.015+(p-100)*0.01;printf(%fn,r);return 0;(5)#include int main()char c；while(c=getchar()!=n)if(c=a&c=z)c=c-32;putchar(c);return 0;(6)#includeint main()int m,k=2;printf(输入一个正整数:n);scanf(%d,&m);while(km)if(m%k=0)printf(%4d,k);m=m/k;elsek+;printf(%4dn,m);return 0;（7）#includeint main()int a,n,s=0,p=0,i;scanf(%d %d,&n,&a);for(i=1;i=n;i+)p=p*10+a;s=s+p;printf(%dn,s);return 0;（8）#includeint main()int i,j,k;for(i=1;i=9;i+)for(j=0;j=9;j+)for(k=0;k=9;k+)printf(%5d,100*i+10*j+k);return 0;（9）#include#includeint main()float a=-10,b=10,x,f1,f2,f;f1=(2*a-4)*a+3)*a)-6;f2=(2*b-4)*b+3)*b)-6;dox=(a+b)/2;f=(2*x-4)*x+3)*x)-6;if(f*f1=1e-6);printf(%6.2fn,x);return 0;（10）#include#includeint main()int n=2;double eps,t,s=0,x;scanf(%lf %lf,&x,&eps);t=x;s=t;while(fabs(t)=eps)t=-t*(2*n-3)*x*x/(2*n-2);s=s+t/(2*n);n+;printf(%d,%lfn,n,s);return 0;（11）#includeint main()unsigned long s,t=0,p=1;scanf(%u,&s);while(s!=0)if(s%10)%2!=0)t=t+(s%10)*p;p=p*10;s=s/10;printf(%un,t);return 0;第四章1单项选择题DDDBD BADCD BDAB2.填空题（1）2（2）嵌套，递归（3）全局变量，静态变量，动态变量（4）auto，static , register，extern（5）外部变量（6）编译，运行3阅读程序，指出结果（1）15（2）5（3）5，4，3（4）i=5 i=2 i=2 i=4 i=2（5）求水仙花数（6）-5*5*5（7）30（8）0 10 1 11 2 12 4程序填空（1）float fun(float , float)，x+y,x-y，z+y,z-y（2）x-16（3）s=0，a=a+b5编程题（1）#includeunsigned int fun(unsigned int);int main()unsigned int s;scanf(%u,&s);printf(%un,fun(s);return 0;unsigned int fun(unsigned int s) unsigned int p=0;while(s!=0)p=p+s%10;s=s/10;return p;（2）#include#include#includevoid f1(float,float,float,float);void f2(float,float,float,float);void f3(float,float,float,float);int main()float a,b,c,d;scanf(%f %f %f,&a,&b,&c);if(a=0)printf(不是一元二次方程n);exit(0);d=b*b-4*a*c;if(d0)f1(a,b,c,d);else if(d=0)f2(a,b,c,d);elsef3(a,b,c,d);return 0;void f1(float a,float b,float c,float d)float x1,x2;x1=(-b+sqrt(d)/(2*a);x2=(-b-sqrt(d)/(2*a);printf(%.2f ,%.2fn,x1,x2);void f2(float a,float b,float c,float d)float x1,x2;x1=-b/(2*a);x2=-b/(2*a);printf(%.2f ,%.2fn,x1,x2);void f3(float a,float b,float c,float d)float x1,x2;x1=-b/(2*a);x2=sqrt(-d)/(2*a);printf(%.2f+i*%.2fn,x1,x2);printf(%.2f-i*%.2fn,x1,x2);（3） #includedouble p(int,double);int main()int n;double x;doscanf(%d,&n);while(n0);scanf(%lf,&x);printf(%lfn,p(n,x);return 0;double p(int n,double x)double pn;if(n=0)pn=1;else if(n=1)pn=x;elsepn=(2*n-1)*x*p(n-1,x)-(n-1)*p(n-2,x)/n;return pn; （4） #include#define RATE 0.053double fun(float);void display(float,int);int main()float dep;int season;scanf(%f %d,&dep,&season);display(dep,season);return 0;double fun(float d)return d*RATE;void display(float d,int s)int i;printf(季度 利息 余额n);printf(-n);for(i=1;i=s;i+)printf(%-4d %-.2f %-.2fn,i,fun(d),fun(d)*i+d);printf(-n);（5） #includedouble fun(void);int main()printf(%lfn,fun();return 0;double fun(void)double s=0;int n=1;while(double)(2*n-1)/(2*n)*(2*n)1e-4)s=s+(double)(2*n-1)/(2*n)*(2*n);n+;return s;（6） #includeint fun(int);int main()int w;scanf(%d,&w);printf(%dn,fun(w);return 0;int fun(int w)int n=1,p=1,m;m=w;while(m10)m=m/10;p=p*10;n+;return w%p;第五章1、选择题C BC B B A D D B2、填空题（1） 0，9（2） float realArray100,char strArray16,int intArray1000（3）运算符 sizeof（4） 6字节3、阅读程序，写出下面程序的运行结果（1） aa bb cc dd（2） ab c d（3）ahAMa（4）0010(5) 1 3 4 5（6）This is the title.Name 1 is RosalindaName 2 is ZekeThe biggest name alpabetically is ZekeBoth names are Rosalinda Zeke(7)0 0 0 0 0 0 0 0 0 1 2 3 4 5 6 7 0 2 5 6 8 10 748 14 0 4 8 12 16 20 24 28 0 5 10 15 20 177 30 35 0 6 12 18 24 30 36 42 0 7 14 21 28 35 42 494、程序填空（1） aij != aji , 1（2） 0, ai amini , maxi = i , amaxi = amini （3） int a, int b, bi = ai, -999, arraycopy(a,b), bi+（4） asizeof(ch), if5、编程题（1）#includeint main ( )int a34 = 0, 2,9,7, 5,13,6,8, 27,11,1,3;int i,j,temp;for(i=0,j=0;j4;j+)temp = a2-ij;a2-ij = aij;aij = temp;for(i=0;i3;i+)for(j=0;j4;j+)printf(%3d,aij);printf(n);return 0;（2）#includeint main ( )static int a66;int i,j,t=1;for(i=0;i6;i+)t = i+1;for(j=0;ji+1;j+)aij = t-;for(i=0;i6;i+)for(j=0;j6;j+)printf(%3d,aij);printf(n);return 0;（3）#include #define M 3#define N 4#define R 5int main( )static int aMN,bNR,cMR;int i,j,k;printf(Matrix a:n);for( i = 0; i M; i+ )for( j = 0; j N; j+ )scanf( %d,&aij );printf(Matrix b:n);for( i = 0; i N; i+ )for( j = 0; j R; j+ )scanf( %d,&bij );for( i = 0; i M; i + )for( j = 0; j N; j+ )for( k = 0; k R; k+)cik += aij*bjk;for( i = 0; i M; i+ )for( j = 0; j R; j+ )printf( %3d,cij );printf(n);return 0;（4）#include #define M 5int main( )static int aM;int i,max = -1,min = 100,maxi,mini,temp;for( i = 0; i M; i+ )scanf( %d,&ai ); /099间的值for( i = 0; i M; i+ )if( max ai )min = ai;mini = i;temp = amaxi;amaxi = amini;amini = temp;for( i = 0; i M; i+ )printf( %3d,ai );return 0;（5）#include #define M 3#define N 4int main( )static int aMN;int max = -1,sumcol=0,sumrow=0;int i,j,maxi,col;for( i = 0; i M; i+ )sumrow = 0;for( j = 0; j N; j+ )scanf( %d,&aij );sumrow += aij;if ( max 0);scanf(%d,&col);for( i = 0; i M; i + )sumcol += aicol-1;printf(The %dth rows sum is max, max=%dn,maxi+1,max);printf(The %dth columns sum=%dn,col,sumcol);return 0;（6）#include #define M 81int main( )static char strM;int i,count = 0;char ch;gets(str);fflush(stdin); /清空输入缓冲区，以便读入字符数据printf(Which character will be found?);ch = getchar();for( i = 0; i strlen(str); i+ )if( ch = stri )count+;printf( The number of character %c is %dn,ch,count );return 0;（7）#include #include #define N 10 /同学人数#define M 5 /课程数void enter_scores(void);void sort_scores(int scoreM, int averageN3);void disp_scores(int scoreM);void histogram(int n, int scoreM);void printchar(int n);static int scoreNM;static int averN3; /第 1列为均值，第 2列原始顺序，第 3列为均值逆序int main()int course;enter_scores();printf(n=Oringenal Score Start=n);disp_scores(score);printf(n=Oringenal Score End=n);printf(n=Sorted Score Start=n);sort_scores(score,aver);printf(n=Sorted Score End=n);printf(nWhich class will be statisticed?n);scanf(%d,&course);histogram(course, score);system(Pause);return 0; /*输入成绩 */void enter_scores()int i, j;for(i=0; iN; i+) for(j=0; jM; j+)scanf(%d,&scoreij);averi0 += scoreij;for( i = 0; i N; i+ )for ( j = 1; j 3; j+ ) averij = i; /*成绩排序. */void sort_scores(int scoreM, int averageN3)int i,j,t;int temp,tempindex;for( i = 0; i N - 1; i+ )for( j = 0; j N - 1 - i; j+ )if ( averagej0 averagej+10 )temp = averagej0;averagej0 = averagej+10;averagej+10 = temp;tempindex = averagej2;averagej2 = averagej+12;averagej+12 = tempindex;printf(n Score1 Score2 Score3 Score4 Score5n);for( i = 0; i N; i+ )t = averagei2;for( j = 0;j M; j+ )printf(%8d, scoretj);printf(n); /*输出成绩 */void disp_scores(int scoreM)int i, j;printf(n Score1 Score2 Score3 Score4 Score5n);for( i = 0; i N; i+ )for( j = 0;j M; j+ )printf(%8d, scoreij);printf(n);void printchar(int n)int i;for (i = 0; i n; +i) putchar(*);void histogram(int course, int scoreM)int i,temp;int segs5 = 0;int scN;for( i = 0; i N; i+ )sci = scoreicourse;for (i = 0; i N; i+)/*统计各分段人数 */temp = (int)sci/10;segs temp6?0:temp-5+; /*成绩/10,将成绩分段 */printf(nSegment Numbern);for (i = 0; i 5; i+) /*输出直方图，每段的人数 */printf(%3d: %5d| , (i+1)*10+50, segsi);printchar(segsi);putchar(n);putchar(n);（8）#include #define M 81int main( )static char strM;int i,count = 0;char ch = 0;gets(str);for( i = 0; i strlen(str); i+ )if( ch stri )ch = stri;for( i = 0; i strlen(str); i+ )if( ch = stri )count+;printf( max = %c ,count = %dn,ch,count );return 0;第六章1.选择题BBDDA CCABD CBCDA A2.填空题（1）常量，变量（2）指针（3）2（4）12，12（5） a0,a33、阅读程序，写出下面程序的运行结果（1）5（2）6（3） abcdefglkjih（4） 976531（5）5,9（6）2,4,5,7,6,0,11,9,7,3,（7）string_a=I am a teacher.string_b=You are a student.string_a=I am a teacher.string_b=I am a teacher.4、程序填空（1） *p != 0, *p-0, j（2） i strlen(str), j=i, k+1（3）a+i, (char)(n%10) + 0（4）*pk = i，a,n,i+1,pk（5） s1+, *s2，s1=p5、编程题（1）#include int main()int a=3,b=7,c=2;int *ptra = &a,*ptrb =&b,*ptrc = &c;int temp;printf(a=%d,b=%d,c=%dn,a,b,c);printf(*ptra=%d,*ptrb=%d,*ptrc=%dn,*ptra,*ptrb,*ptrc);if ( *ptra *ptrb )temp = *ptra;*ptra = *ptrb;ptrb = temp;if ( *ptra *ptrc )temp = *ptra;*ptra = *ptrc;*ptrc = temp;if ( *ptrb *ptrc )temp = *ptrb;*ptrb = *ptrc;*ptrc = temp;printf(a=%d,b=%d,c=%dn,a,b,c);printf(*ptra=%d,*ptrb=%d,*ptrc=%dn,*ptra,*ptrb,*ptrc);return 0;（2）#include #include void inputdata(int a,int n);void process(int a,int n);void outputdata(int a,int n);int main()int a10,n=10;inputdata(a,n);outputdata(a,n);process(a,n);outputdata(a,n);system(Pause);return 0;void inputdata(int a,int n) /099之间的数int i;for( i = 0; i n; i+ )scanf(%d,a+i);void outputdata(int *ptr,int n)int i;printf(n=OutPut Data Start=n);for( i = 0; i n; i+ )printf(%4d,*ptr+);printf(n=OutPut Data End=n);void process(int *ptr,int n)int i,maxi,mini;int max=-1,min=101;for( i = 0; i n; i+ )if ( max *(ptr+i) )min = ptri;mini= i;if ( mini != 0)i = ptr0;ptr0 = ptrmini;ptrmini = i;if (maxi != n-1)i = ptrn-1;ptrn-1 = ptrmaxi;ptrmaxi = i;if (maxi = 0 & mini = n-1)i = ptrmaxi;ptrmaxi = ptrmini;ptrmini = i;（3）#includeint strLength (char *);int main()static char str81;gets(str);printf(string %s length:%3dn,str,strLength(str) ;system(Pause);return 0;int strLength (char *s)char *p=s;while (*p) p+ ;return (p-s) ;（4）#include #define M 3#define N 4void Transpose (int (*a)N,int (*T)M);int main( )static int aMN,TNM;int i,j;for( i = 0; i M; i+ )for( j = 0; j N; j+ )scanf( %d,&aij );printf(n=Oringinal Matrix Start=n);for( i = 0; i M; i + )for( j = 0; j N; j+ )printf( %4d,aij );printf(n);printf(n=Oringinal Matrix End=n);Transpose(a, T);printf(n=Transpose Matrix Start=n);for( i = 0; i N; i + )for( j = 0; j M; j+ )printf( %4d,Tij );printf(n);printf(n=Transpose Matrix End=n);return 0;void Transpose (int (*a)N,int (*T)M)int i,j;for( i = 0; i N; i+ )for( j =0; j M; j+ )Tij = aji;（5）#include int main()static char source81,target81;int result;gets(source);gets(target);result = Strcmp(source,target);if (result)if( result 0 )printf(%s %sn,source,target);elseprintf(%s = %sn,source,target);return 0;int Strcmp(char *s,char *t)while (*s & *t & (*s = *t)s+;t+;return *s - *t;（6）#include #define M 5#define N 3int sum (int *a);int main( )static int aMN;int i,j;for( i = 0; i M; i+ )for( j = 0; j N; j+ )scanf( %d,&aij );for( i = 0; i M; i + )printf(Row %d sum: %3dn, i, sum(ai);return 0;int sum (int *ptr)int i,result = 0;for( i = 0; i N; i+ )result += *(ptr+i);return result;第七章1选择题CCDBA CBADB DDA2.判断题FTTFT FTFTT第八章1.选择题CDAAD CDB2.填空题（1）.(成员域访问运算符)，-(成员域间接访问运算符) （2）4,6.0（3）enum（4） typedef（5）age, q-name,q-age3、阅读程序，写出下面程序的运行结果（1） p!=NULL, c+, p-next（2） p1-next, p1-next, p1-next4、程序阅读题（1） 7,3（2）zhangping 20（3） Li:3 Zhang:3 Wang:25编程题#include #include #define N 10 /*学生人数 */#define M 3 /*课程数 */struct stu /*定义结构体类型 */char name15;char num6;float scoreM;float aver; studentN; /*说明结构体变量 */struct stu findmax(struct stu student);void input(struct stu student);void output(struct stu student);int main()struct stu temp;input(student);output(student);temp = findmax(student);printf(Max is:n);printf(%15s%8s%7.2f%7.2f%7.2f%7.2f,,temp.num, temp.score0,temp.score1,temp.score2, temp.aver/M);system(Pause);return 0;struct stu findmax(struct stu student)float max = 0.0;int i,maxi;for(i=0; iN; i+)if(max studenti.aver)max = studenti.aver;maxi = i;return studentmaxi;void input(struct stu student)int i,j;printf(input data:n);for( i=0;iN;i+)scanf(%s %s,,studenti.num);studenti.aver = 0;for( j=0;jM;j+)scanf(%f, &studenti.scorej);studenti.aver += studenti.scorej;void output(struct stu student)int i,j;for( i=0;iN;i+)printf(%15s%8s,,studenti.num;for( j=0;jM;j+)printf(%7.2f, studenti.scorej);printf(%7.2fn,studenti.aver/M);第九章1.选择题AD