C语言程序设计（谭浩强）第八章详细课后答案

#if 0 //8.1 #include #include void main() {

int Common_divisor(int a,int b); int Common_mutiple(int m,int n); int result_1,result_2; int number_1,number_2;

printf(\ scanf(\ result_1 = Common_divisor(number_1,number_2); result_2 = Common_mutiple(number_1,number_2);

printf(\最大公约数：%d\\n最小公倍数：%d\\n\}

int Common_divisor(int a,int b) {

int r = 1; while(r != 0) { if(a>b)

{

r = a%b;

a = b; b = r; if(r == 0) {

return a;

break; }

} else {

r = b%a;

b = a; if(r == 0) {

return b;

break; } a = r;

} }

}

int Common_mutiple(int m,int n) {

int Common_divisor(int a,int b);

int temp = 0,result = 0;

temp = Common_divisor(m,n); } #endif

#if 0 //8.2 #include #include

float result_1 =0.0,result_2 = 0.0; void main() {

void Funvtion_1(float a,float b,float temp); result = (m*n)/temp; return result;

void Function_2(float a,float b); float a,b,c; float temp;

printf(\ scanf(\ temp = b*b-4*a*c; if(temp > 0) {

Funvtion_1(a,b,temp);

printf(\

}

else if(temp < 0) {

printf(\此函数没有根！\\n\ } else {

Function_2(a,b);

printf(\

} }

void Funvtion_1(float a,float b,float temp) {

result_1 = (-b+temp)/(2*a);

}

result_2 = (-b-temp)/(2*a);

void Function_2(float a,float b) {

result_1 = (-b)/(2*a); } #endif

#if 0 //8.3 #include #include void main() {

void Prime(int n); int m;

printf(\ scanf(\ Prime(m); }

void Prime(int n)

{

int i = 0 ,k; k = (int)sqrt(n); for(i = 2; i <= k;i++) {

if(n%i == 0) { break; }

} if(i > k) {

printf(\ } else {

printf(\ } } #endif #if 0

#include #include int c[3][3]; void main() {

void Function(int b[3][3]); int a[3][3] = {{1,2,3},{4,5,6},{7,8,9}}; int i,j;

// int d[3][3];

int k = sizeof(a[2])/sizeof(int); //列数 int n = sizeof(a)/sizeof(int); for(i = 0; i < n/k;i++) {

for(j = 0;j < k;j++) {

printf(\ }

printf(\ }

Function(a);

for(i = 0; i < k;i++) {

for(j = 0;j < n/k;j++) {

printf(\ }

printf(\ }

void Function(int b[3][3]) { }

int i = 0,j = 0; } #endif

int k = sizeof(b[3])/sizeof(int); int n = sizeof(b)/sizeof(int); for(i = 0;i < k ;++i) {

for(j = 0;j < k; ++j) } {

c[j][i] = b[i][j]; }

#if 0

#include #include #include void main() {

void Function(char a[100],char b[100]); char a[100]; extern int b[100]; int n = sizeof(a); printf(\ gets(a); Function(a,b); }

void Function(char a[],char b[]) {

int i = 0;

int n = sizeof(a)/sizeof(char); int m = strlen(a); for(i = 0; i < m;i++)

{

b[i] = a[m-1-i]; }

//printf(\ //puts(b); } #endif

#if 0 //8.6 #include #include void main() {

char a[20]; char b[10];

printf(\ gets(a);

printf(\ for(i = 0;i < m;i++) {

putchar(b[i]);

}

gets(b); strcat(a,b); puts(a); } #endif

#if 0 //8.6 #include #include #include int a[20]; void main() {

void Connect(char a[],char b[]);

char b[10];

printf(\ gets(a);

printf(\ gets(b);

Connect(a,b);

// puts(a); printf(\

}

void Connect(char a[],char b[]) {

int i = 0; int j = 0;

while(a[i] != '\\0') { i++; }

while(b[j] != '\\0') {

a[i++] = b[j++]; }

// a[i] = '\\0'; } #endif #if 0//8.7 #include #include

#include char b[100]; void main() {

void Research_vowel(char a[]); char a[50];

printf(\ gets(a);

Research_vowel(a); puts(b); }

void Research_vowel(char a[]) {

int i = 0,j = 0; for(; i < strlen(a);i++) {

if(a[i] == 'a'|| a[i] == 'e' || a[i] == 'i' || a[i] == 'o' || a[i] == 'u') {

b[j] = a[i];

j++;

} }

} #endif #if 0//8.8 #include #include char a[4]; void main() {

void Divide(int n); }

void Divide(int n) int n = 0,i = 0;

printf(\scanf(\Divide(n); for(;i<4;i++) {

printf(\}

printf(\

{

int i = 0,c = 0,b = 0,m = 1000; } #endif #if 0//8.9 #include #include #include int m = 0,n = 0,r = 0,l = 0; void main() {

void Research_number(char a[]); while(m >= 1) {

c = n/m; b = n%m; m = m/10; a[i] = c; n = b; i++; }

char a[50]; int i = 0;

printf(\ gets(a);

/*for(;i

printf(\ }*/ puts(a); puts(\

Research_number(a);

printf(\字母个数是：%d,数字个数是：%d,空格个数是：它：%d\\n\}

void Research_number(char a[]) {

int i = 0; for(i = 0;i

if((a[i] >= 'a' && a[i] <= 'z') || (a[i] >= 'A' && a[i] <= 'Z'))

{

%d,其 }

}

m++; }

else if(a[i] > 47 && a[i] < 58) { n++; }

else if(a[i] == 32) { r++; } else { l++; }

#endif

#if 0 //8.10 #include #include #include

void main() {

void Array(char a[]); char b[20];

printf(\ gets(b);

printf(\ Array(b); }

void Array(char a[]) {

int i = 0,place = 0,point = 0,length = 1; //point表示最长单词的开始位置 place表示最长单词最后的一个位置

int max = 0,j = 0;

int flag = 0; //为0 时是空格 为1时是单词 max = length;

for(i = 0;i<=strlen(a);i++) {

if(a[i] != ' ' && a[i] != '\\0') {

if(0 == flag)

{

j = i;

flag = 1;

} else

length++; //这个题让我做的非常的难过的复习 } else { flag = 0; if(max < length) {

max = length; point = j; place = i;

} length = 1; }

} for(i = point;i <= place;i++)

以后要好好

} /*

{

printf(\}

printf(\

int judge_words(char b[20]) {

int i = 0,flag = 1;

for(i = 0;i < strlen(b); i++) }*/ {

if((a[i] >= 'a' && a[i] <= 'z') || (a[i] >= 'A' && a[i] <= 'Z')) } {

flag = 1; } else {

flag = 0; }

#endif

#if 0 //8.11 #include #include void main() {

void bubbling(char a[]); char a[10];

printf(\ gets(a); bubbling(a); puts(a); }

void bubbling(char a[]) {

int i = 0,j = 0;

char temp;

for(i = 0;i

for( j = 0;j

}

}

{

if(a[j] > a[j+1]) } {

temp = a[j];

a[j] = a[j+1]; a[j+1] = temp;

}

#endif

#if 0 //8.12 #include #include void main() {

float Function(float x);

float x = 1.5,x1 = 0.0;

x1 = Function(x); printf(\}

float Function(float x) {

float x1; float y,y1;

while(fabs(y1)>=1e-6) {

x = x1;

y1 = x*x*x+2*x*x+3*x+4;

y = 3*x*x+4*x+3;

x1 = x - (y1/y); } return x1; } #endif

#if 0//8.13 #include #include void main() {

float p(float x,int n);

float x = 0.0,result = 0.0; int n = 0;

printf(\ scanf(\ result = p(x,n);

printf(\}

float p(float x,int n) {

float y = 0.0;

if(n == 0) { y = 0; }

else if(n == 1) { y = x; } else {

y = ((2*n-1)*x-p(x,n-1)-(n-1)*p(x,n-2))/n;

}

} return y;

#endif

#if 0//8.14 #include #include int r = 0,l = 0; void main() {

float* EStudent_aver(float scores[10][5]); float* EClass_aver(float scores[10][5]); float Maxscore(float scores[10][5]); float variance(float scores[10][5]); float

scores[10][5]

=

{{76,43,46,73,46},{34,67,89,32,47},{31,68,73,16,87},{31,67,31,37,63},{16,37,61,67,86},

{31,34,60,49,29},{89,89,87,87,98},{97,34,89,42,89},{45,67,34,18,64},{

32,16,87,42,15}};

float *Student_aver,*Class_aver,Student_max = 0.0,aver_variance =

0.0;

int i = 0,j = 0,k = 0;

/* char Student_name[] = {\Xiaoming Ligang Xiaotao Zhangsan Xiaoqiang CBC Baixu Gongcheng BOBO \

char score_name[] = {\ Math English Chemitry

WuLi\

printf(\

for(i = 0;i < strlen(score_name);i++) {

printf(\} puts(\

for(i = 0;i < strlen(Student_name);i++) {

printf(\if(Student_name[i] == 32) {

for(j = 0;j < 5;j++) {

printf(\ %.0f\\t\ } k++; puts(\

}

}*/

/* printf(\ for(i = 0; i < 10;i++) {

for(j = 0;j < 5;j++) {

printf(\ %.0f\\t\ } puts(\

}*/ // float scores[10][5];

printf(\ course1 course2 course5\\n\ for(i = 0;i < 10;i++) {

printf(\ for(j = 0;j < 5;j++) {

printf(\ }

puts(\

course3 course4

}

Student_aver = EStudent_aver(scores); Class_aver = EClass_aver(scores); Student_max = Maxscore(scores); aver_variance = variance(scores); printf(\ for(i = 0;i < 10;i++) {

printf(\ \ }

printf(\ for(i = 0 ;i < 5;i++) {

printf(\ \ }

printf(\

printf(\Max Score:\\n %.2f course%d\\n\ printf(\}

float * EStudent_aver(float scores[10][5])

Name: No.%d , Course:

%.2f\\n\

{

static float aver[10],sum = 0.0; }

float* EClass_aver(float scores[10][5]) {

static float aver_1[5],sum = 0.0; int i = 0,j = 0;

for(j = 0;j<5;j++) {

for(i = 0;i<10;i++) int i = 0,j = 0; for(i = 0;i < 10;i++) {

for(j = 0; j < 5; j++) }

return aver; {

sum += scores[i][j]; }

aver[i] = sum/5; sum = 0;

{

sum +=scores[i][j]; }

float Maxscore(float scores[10][5]) {

int i = 0,j = 0;

float max = scores[0][0]; for(i = 0;i < 10;i++) {

for(j = 0;j < 5;j++) {

if(max < scores[i][j]) {

max = scores[i][j]; r = i + 1; l = j + 1; }

return aver_1; }

aver_1[j] = sum/10; sum = 0;

}

}

}

}

return max;

float variance(float scores[10][5]) {

float* EStudent_aver(float scores[10][5]);

float s = 0.0;

float sum_1 = 0.0,sum_2 = 0.0; float number_1 = 0.0,number_2 = 0.0; float* student_aver; int i = 0,j = 0;

student_aver = EStudent_aver(scores);

for(i = 0;i<10;i++) {

sum_1 += student_aver[i]*student_aver[i];

sum_2 += student_aver[i]; }

number_1 = sum_1/10;

number_2 = (sum_2/10)*(sum_2/10);

}

s = number_1 - number_2; return s;

#endif

#if 0 //测试 static #include #include static j; void f1() {

static i = 0; i++; } void f2() { j = 0; j++; }

void main() {

int k = 0;

for(k = 0;k < 10;k++) { f1();

f2();

} } #endif

#if 0//8.16 #include #include void main() {

void Change(int n); int m = 0;

printf(\ scanf(\ // printf(\ Change(m); }

void Change(int n)

{

//int m; } #endif

#if 0//8.17 #include #include void main() {

void Function(int n); printf(\十进制是: %d\\n\

int m;

printf(\scanf(\

Function(m); }

void Function(int n) { int i;

/* if(n!=0)

{

ch[i] = n;

temp = n/10; } #endif

#if 0 //今天是今年的多少天 } else {

ch[i] = 0; }

return ch;*/ i = n/10; if(i != 0) {

Function(i); }

putchar(n+'0'); putchar(32); i++;

Function(temp);

#include #include void main() {

int i = 1,d = 0,sum = 0;

int year,month,day;

printf(\scanf(\sum = day; for(;i

switch(i) { case 1: case 3: case 5: case 7: case 8:

case 10:

case 12: d = 31; break;

case 2:

if(year@0 == 0 || year%4 == 0 && year0!=0)

{

d = 29; } else {

d = 28; } break;

case 4: } #endif

#if 0 //8.15 #include case 6: case 9:

case 11: d = 30;break; } sum += d; }

printf(\

#define N 10 void main() {

void Enter_massage(char staff_name[N][10],int staff_number[N]); void Sort(char staff_name[N][10],int staff_number[N]);

int middle_search(int staff_number[N],int number); int number,temp = 0; char staff_name[N][10]; int staff_number[N];

Enter_massage(staff_name,staff_number);//输入信息 Sort(staff_name,staff_number); printf(\scanf(\

temp = middle_search(staff_number,number); }

void Enter_massage(char staff_name[N][10],int staff_number[N]) {

int i;

for(i = 0;i < N;i++)

printf(\printf(\ : %s\\n\

{

printf(\

scanf(\ fflush(stdin);

printf(\ }

void Sort(char staff_name[N][10],int staff_number[N]) { int i,j; int temp1;

char temp[N][10]; for(i = 0;i < N - 1; i++) {

for(j = 0;j < N - 1 - i; j++) {

if(staff_number[j]>staff_number[j+1]) {

gets(staff_name[i]);

}

temp1 = staff_number[j];

strcpy(temp[j],staff_name[j]);

staff_number[j] = staff_number[j+1];

strcpy(staff_name[j],staff_name[j+1]);

staff_number[j+1] = temp1; }

strcpy(staff_name[j+1],temp[j]);

}

/*if(staff_number[i]

temp1 = staff_number[i];

staff_number[i] = staff_number[i+1]; staff_number[i+1] = temp1; }

*/ }

int middle_search(int staff_number[N],int number) //折半查找法！ }

for(i = 0;i < N;i++) {

printf(\ }

printf(\

{

int min = 0,high = 0,mid = 0;

int i = 0; min = 0; high = N - 1; while(min <= high) {

mid = (min+high)/2; }

if(staff_number[mid] > number) {

high = mid - 1; }

else if(staff_number[mid] < number) {

min = mid + 1; } else {

return mid; } }

#endif

/*fasdfa the world hello

int flag=0;

flag=1;//letter

flag=0;//space*/

#if 0 //有问题 输出的是不对的！ 为什么指针值temp+1的值不是指向的name[1]这一行的首地址 而是++后指向的是name[0]下一列的地址呢？ #include void main() {

char name[5][10];

char temp[5][10]; int i = 0;

// temp = &name[0]; } #endif

#if 0 //看不懂的程序 8.15 #define N 10 find(a,b) int a[],b[]; {

int i,j,s,t,c[N][2]; for(i=0;i

for(i = 0;i < 5;i++) {

gets(name[i]); }

for(i = 0;i < 5;i++) {

//puts(name[i]); }

puts(temp[i]);

strcpy(temp[i],name[i]);

c[i][1]=a[i];c[i][1]=i;

} for(i=0;i

for(j=0;j

if(c[i][0]>c[i+1][0]) {

t=c[i][0]; c[i][0]=c[i+1][0]; c[i+1][0]=t; s=c[i][1]; c[i][1]=c[i+1][1]; c[i+1][1]=s;

}

for(i=0;i

b[i]=c[i][1];

return;

}

lookfor(h,k) int h[],k; {

int i,j;

for(i=0;i

if(h[i]-k==0) j=i;

return j;

} main() {

int number[N],x[N],i,j,u,p; char name[N][20]; for(i=0;i

gets(name[i]); scanf(\

} scanf(\ find(number,x); u=lookfor(number,p); for(i=0;i

printf(\ puts(name[x[i]]);

}

puts(name[x[u]]);

} #endif

#if 1 //16进制转换成10进制 #include #include #define N 10 int flag = 1; void main() {

extern int sum;

int convert(char str[],int n); char str[N]; int s = 0,n = 0;

puts(\gets(str); n = strlen(str); s = convert(str,n); if(1 == flag) {

printf(\} else {

printf(\

}

}

int convert(char str[],int n) {

int i,j = 0;

int sum = 0;

for(i = n - 1;i > -1;i--,j++) {

if(str[i] > 47 && str[i] < 58) {

sum = sum + (str[i] - 48) * (int)pow(16,j); }

else if(str[i] > 64 && str[i] < 71) {

sum = sum + (str[i] - 55)* (int)pow(16,j); }

else if(str[i] > 96 && str[i] < 103) {

sum = sum + (str[i] - 87) * (int)pow(16,j); }

}

}

else {

flag = 0; }

return sum;

#endif #if 0

#include #include void main() {

printf(\} #endif

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