运行测试：
源码：
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <windows.h>
#include <conio.h>
using namespace std;
void CleanConsole(int x, int y) //y是指定要删除的行数，x可以从0位置开始循环替换到的截止位置
{
COORD loc;
loc.Y = y; //固定行数
for (int i = 0; i < x; i++) //x从指定位置开始循环进行替换
{
loc.X = i;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), loc);
cout << " " << endl;;
}
}
void CleanConsole(int y) //y是指定要删除的行数，直接指定x：0~50的位置进行清空
{
COORD loc;
loc.Y = y; //固定行数
for (int i = 0; i < 50; i++) //x从指定位置开始循环进行替换
{
loc.X = i;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), loc);
cout << " " << endl;;
}
}
void WriteChar(short x, short y, char *pchar, char color)
{
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1; //光标的厚度
cci.bVisible = FALSE; //光标不可见
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);
COORD loc = { x,y };
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), loc);
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), color);
cout << pchar;
}
int ShowOptions()
{
system("mode con cols=85 lines=28");
char *options[] = { "二阶行列式" , "三阶行列式","注意事项","退出" }; //这里这样定义是为了使得option的值能和options的下标对应，便于刷新输出
WriteChar(18 + 11, 10, "线性代数之行列式计算 v1.0", 10);
WriteChar(16 + 11, 12, "→", 10);
for (int i = 0; i < 4; i++)
{
WriteChar(18 + 11, 12 + i, options[i], 10);
}
char ch;
int option = 0; //默认指向最上面的选项
while (true)
{
if (_kbhit())
{
ch = _getch(); //不进行回显
if (ch == 27) //esc
{
return -1;
}
if (ch == 72 || ch == 80 || ch == '\r') //只检测上下键+回车直接返回当前的option值
{
if (ch == 72) //UP
{
WriteChar(16 + 11, 12 + option, " ", 0);
option--;
}
else if (ch == 80) //DOWN
{
WriteChar(16 + 11, 12 + option, " ", 0);
option++;
}
if (option < 0) //防止越界
{
option = 0;
}
else if (option >= 4) //一直让其指向租后一个选项
{
option--;
}
//处理按上下键之后的显示
WriteChar(16 + 11, 12 + option, " ", 0);
Sleep(100);
WriteChar(16 + 11, 12 + option, "→", 10);
WriteChar(18 + 11, 12 + option, options[option], 10);
if (ch == '\r')
{
return option;
}
}
}
}
}
void Page_1()
{
system("cls");
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1; //光标的厚度
cci.bVisible = TRUE; //光标可见
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);
printf("请输入二阶行列式的4个数据，按照行式输入：\n");
int a[4];
int i = 0;
int temp_number = 0;
int result = 0;
while (i<4)
{
scanf("%d", &temp_number);
if (temp_number > -1000 && temp_number<1000)
{
a[i] = temp_number;
i++;
}
}
result = a[0] * a[3] - a[1] * a[2];
printf("结果：%ld", result);
printf("\n\n\n\n");
printf("**按任意键返回主菜单**");
}
void Page_2()
{
system("cls");
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1; //光标的厚度
cci.bVisible = TRUE; //光标可见
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);
printf("请输入三阶行列式的9个数据，按照行式输入：\n");
int a[9]; //设置数组存储三阶行列式的9个数据
long result_0 = 1;
long result_1 = 1;
long result_temp = 0;
long result = 0;
int temp_number = 0;
int i = 0;
while (i<9)
{
scanf("%d", &temp_number);
if (temp_number > -1000 && temp_number<1000)
{
a[i] = temp_number;
i++;
}
}
int index_0[9] = { 0,4,8,1,5,6,2,3,7 };
int index_1[9] = { 2,4,6,0,5,7,1,3,8 }; //存储主对角线和副对角线的数组下标
for (int i = 0; i < 9;)
{
result_0 = 1;
result_1 = 1;
for (int j = 0; j < 3; j++, i++)
{
result_0 *= a[index_0[i]];
result_1 *= a[index_1[i]];
}
result_temp = result_0 - result_1;
result += result_temp;
}
printf("结果：%ld", result);
printf("\n\n\n\n");
printf("**按任意键返回主菜单**");
}
void Page_3()
{
system("cls");
WriteChar(20, 10, "注意： 行列式中的数值范围为[-1000,1000]\n\n", 15);
WriteChar(20, 12, "**按任意键返回主菜单**\n\n\n\n", 15);
}
int main()
{
system("title 线性代数");
while (true)
{
int result = ShowOptions();
if (result == 0)
{
Page_1();
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1;
cci.bVisible = FALSE;
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);
_getch();
//system("pause");
}
else if (result == 1)
{
Page_2();
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1;
cci.bVisible = FALSE;
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);
_getch();
//system("pause");
}
else if (result == 2)
{
Page_3();
CONSOLE_CURSOR_INFO cci;
cci.dwSize = 1;
cci.bVisible = FALSE;
SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cci);
_getch();
//system("pause");
}
else
{
cout << endl << endl;
return -1;
}
}
return 0;
}
