#include “includes.h”
int arrays[20];
void swap(int& a, int& b)
{
int temp;
temp = a;
a = b;
b = temp;
return;
}
void swap_str(char* &a, char* &b)
{
char *temp;
temp = a;
a = b;
b = temp;
return;
}
void Question6_1(int &a,int &b,int &c)
{
cout << “6-1” << endl;
if (a > b)
swap(a, b);
if (b > c)
swap(b, c);
if (a > c)
swap(a, c);
cout << a << b << c<<endl;
return;
}
void Question6_2(char *a, char *b, char *c)
{
if (strcmp(a, b)> 0)
swap_str(a, b);
if (strcmp(a, c) > 0)
swap_str(a, c);
if (strcmp(b, c) > 0)
swap_str(b, c);
cout << a << b << c << endl;
return;
}
void input_10_number()
{
int i = 0;
for (i = 0; i < 10; i++)
{
cin >> arrays[i];
}
}
void deal_10_word()
{
Position max_number, min_number;
max_number.value = 0;
max_number.index = 0;
min_number.value = 0;
min_number.index = 0;
int i = 0;
for (i = 0; i < 10; i++)
{
if (arrays[i] > max_number.value)
{
max_number.value = arrays[i];
max_number.index = i;
}
if (arrays[i] <= min_number.value)
{
min_number.value = arrays[i];
min_number.index = i;
}
}
swap(arrays[0], arrays[min_number.index]);
swap(arrays[9], arrays[max_number.index]);
}
void print_10_words()
{
int i;
for (i = 0; i < 10; i++)
{
cout << arrays[i] << ” “;
}
cout << endl;
return;
}
void Question6_3()
{
input_10_number();
deal_10_word();
print_10_words();
}
void move_words(int a[],int position)
{
int recv_array[10];
int temp_array[10];
int recv_position;
recv_position = position;
for (int i = 0; i < 10; i++)
{
recv_array[i] = a[i];
}
}
void Question6_4(int m)
{
int a[10] = { 0,1,2,3,4,5,6,7,8,9 };
int b[100];
int i = 0,b_index = 0;
int length = (sizeof(a) / sizeof(a[0]));
for (i = 0; i < length; i++)
{
b_index = ((i + m) % length);
b[b_index] = a[i];
}
cout << “m=” << m << endl;
for (i = 0; i < length; i++)
{
cout << b[i] << ” “;
}
cout << endl;
}
void Question6_5(int digit_number)
{
int a[10000],search_index=0;
int count=0,left_number;
left_number = digit_number;
int result = 0,j=0;
cout << “digitnumber=” << digit_number;
for (int i = 0; i < digit_number; i++)
{
a[i] = i;
}
while (left_number != 0)
{
if (a[j] != -1)
{
if (count == 2)
{
a[j] = -1;
left_number–;
count = 0;
}
else
{
count++;
result = j;
}
}
j++;
j = j % digit_number;
}
cout << “result:” << result << endl;
}
void Question6_6(char * str)
{
char* p_str;
p_str = str;
int count_str = 0;
//当p_str指向的数组元素值不为空，进行循环体，
//值为空时结束循环体。
while (*p_str)
{
count_str++;
p_str++;
}
cout << “str length：” << count_str<<endl;
}
void Question6_7_copy_str(int start_position)
{
char str[100] = “abcdefghijklmnopqrstuvwxyz”;
char copy_to_str[100];
char* p_str, * p_copy_to_str;
p_copy_to_str = copy_to_str;
p_str = str;
p_str = p_str + start_position;
while (*p_str)
{
*p_copy_to_str = *p_str;
p_copy_to_str++;
p_str++;
}
//复制后后的p_copy_to_str中，系统没有为它自动分配‘\0’,需要手动添加。
*p_copy_to_str = ‘\0’;
p_copy_to_str = copy_to_str;
p_str = str;
cout << “original:” << p_str << endl;
cout << “result:” << start_position << ” ” << p_copy_to_str <<endl;
return;
}
//统计不用类型字符个数
void Question6_8()
{
char str[100];
int lower=0, upper=0, digit=0, others=0,space = 0,i=0;
//错误输入带有空格的字符串方式：cin >> str;
//应该用getchar(),连续接受字符串。
while ((str[i] = getchar())!=’\n’)
i++;
//请注意字符串拼接，在最后添加’\0’结束符。
str[i] = ‘\0’;
cout << str;
char* p_str;
p_str = str;
//以’\0’为结束符。
while (*p_str!=’\0′)
{
if (*p_str >= ‘0’ && *p_str <= ‘9’)
digit++;
if (*p_str >= ‘a’ && *p_str <= ‘z’)
lower++;
else if (*p_str >= ‘A’ && *p_str <= ‘Z’)
upper++;
else if (*p_str == ‘ ‘)
space++;
else
others++;
p_str++;
}
cout << “大写字母：” << upper << endl;
cout << “小写字母：” << lower << endl;
cout << “空格：” << space << endl;
cout << “其他字符：” << others << endl;
}
void Question6_9(int n)
{
int arrays[6][6] =
{
{1,2,3,4,5},
{6,7,8,9,10},
{11,12,13,14,15},
{16,17,18,19,20},
{21,22,23,24,25}
};
int row = 0, col = 0,step;
for (int i = 0; i < n; i++)
{
for (int col = 0; col < i; col++)
{
swap(arrays[i][col], arrays[col][i]);
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
cout << arrays[i][j] << ” “;
}
cout << endl;
}
}
void Question6_10()
{
int arrays[6][6] =
{
{1,2,3,4,5},
{6,7,8,9,10},
{11,12,13,14,15},
{16,17,18,19,20},
{21,22,23,24,25}
};
int data[100];
int data_index=0;
int min=0,pos_x,pos_y;
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
if (arrays[2][2] < arrays[i][j])
{
swap(arrays[i][j], arrays[2][2]);
}
if(arrays[0][0] > arrays[i][j])
{
swap(arrays[0][0], arrays[i][j]);
}
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
if (i == 0 && j == 0)
continue;
if (arrays[0][4] > arrays[i][j])
{
swap(arrays[0][4], arrays[i][j]);
}
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
if ((i == 0 && j == 0)|| (i == 0 && j == 4))
continue;
if (arrays[4][0] > arrays[i][j])
{
swap(arrays[4][0], arrays[i][j]);
}
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
if ((i == 0 && j == 0) || (i == 0 && j == 4)||(i==4&&j==0))
continue;
if (arrays[4][4] > arrays[i][j])
{
swap(arrays[4][4], arrays[i][j]);
}
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
cout << arrays[i][j] << ” “;
}
cout << endl;
}
}
void Sort_String(char** str ,int Ncase)
{
for (int i = 0; i < Ncase; i++)
{
for (int j = i; j < Ncase; j++)
{
if (strcmp(str[i], str[j]) > 0)
{
swap_str(str[i], str[j]);
}
}
}
for (int i = 0; i < Ncase; i++)
cout << str[i] << endl;
}
void Question6_11_12()
{
char * str[100];
for (int i = 0; i < 10; i++)
{
str[i] = new char[100];
}
for (int i = 0; i < 10; i++)
{
cin >> str[i];
}
Sort_String(str,10);
}
//6-13
float integral(float (*p)(float), float a, float b, int n)
//用矩形法求定积分的通用函数
{
int i;
float x, h, s;
h = (b – a) / n;
x = a;
s = 0;
for (i = 1; i <= n; i++)
{
x = x + h;
s = s + (*p)(x) * h;
}
return(s);
}
float fsin(float x) // 计算 sin(x) 的函数
{
return sin(x);
}
float fcos(float x) // 计算 cos(x) 的函数
{
return cos(x);
}
float fexp(float x) // 计算 exp(x)的函数
{
return exp(x);
}
void Question6_12()
{
int Ncase;
int data[1000];
cout << “请输入数字的个数：” << endl;
cin >> Ncase;
cout << “请输入数字：” << endl;
for (int i = 0; i < Ncase; i++)
{
cin >> data[i];
}
for (int i = Ncase – 1; i >= 0; i–)
{
cout << data[i]<<” “;
}
cout << endl;
}
void Question6_14()
{
char str[] = “abcd123 123?123tab222”;
int result[1000] = {0,0,0,0,0,0,0,0,0,0};
int temp[1000];
int num_count = 0, result_cnt=0;
cout << str << endl;
char* p_str;
p_str = str;
while (*p_str != ‘\0’)
{
if (*p_str > ‘0’ && *p_str < ‘9’)
{
temp[num_count] = (*p_str) – ‘0’;
num_count++;
}
else
{
if (num_count != 0)
{
for (int i = 0; i < num_count; i++)
{
result[result_cnt] = result[result_cnt] * 10 + temp[i];
}
result_cnt++;
num_count = 0;
for (int i = num_count – 1; i >= 0; i–)
{
temp[i] = 0;
}
}
}
p_str++;
}
if (num_count != 0)
{
for (int i = 0; i < num_count; i++)
{
result[result_cnt] = result[result_cnt] * 10 + temp[i];
}
result_cnt++;
num_count = 0;
for (int i = num_count – 1; i >= 0; i–)
{
temp[i] = 0;
}
}
cout << “共有” << result_cnt << “个整数” << “分别如下：” << endl;
for (int i = 0; i < result_cnt; i++)
cout << result[i] << ” “;
cout << endl;
}
int Question6_17_strcmp(const char* str1,const char* str2)
{
const char * p_str1, * p_str2;
p_str1 = str1;
p_str2 = str2;
int result = 0;
while (true)
{
if (*p_str1 == ‘\0’ && *p_str2 == ‘\0’)
break;
if (*p_str1 == ‘\0’ && *p_str2 != ‘\0’)
return -1;
if (*p_str1 != ‘\0’ && *p_str2 == ‘\0’)
return 1;
if (*p_str1 > *p_str2)
{
result = *p_str1 – *p_str2;
return result;
}else if (*p_str1 < * p_str2)
{
result = *p_str1 – *p_str2;
return result;
}
if(*p_str1!=’\0′)
p_str1++;
if(*p_str2!=’\0′)
p_str2++;
}
return 0;
}
void Question6_18(int month)
{
char* Month[20];
for (int i = 0; i < 20; i++)
{
Month[i] = new char[20];
}
strcpy(Month[1],”January”);
strcpy(Month[2] , “February”);
strcpy(Month[3] , “March”);
strcpy(Month[4], “April”);
strcpy(Month[5], “May”);
strcpy(Month[6], “June”);
strcpy(Month[7], “July”);
strcpy(Month[8], “Auguest”);
strcpy(Month[9], “September”);
strcpy(Month[10], “October”);
strcpy(Month[11], “November”);
strcpy(Month[12], “December”);
cout << Month[month] << endl;
}