C语言写一个4*16的矩阵开关

这里给出一个使用单片机的C语言程序，实现4*16的矩阵开关：

#include <reg52.h>

#define ROWS 4
#define COLS 16

// 定义矩阵开关的IO口
sbit ROW1=P1^0;
sbit ROW2=P1^1;
sbit ROW3=P1^2;
sbit ROW4=P1^3;
sbit COL1=P1^4;
sbit COL2=P1^5;
sbit COL3=P1^6;
sbit COL4=P1^7;
sbit COL5=P2^0;
sbit COL6=P2^1;
sbit COL7=P2^2;
sbit COL8=P2^3;
sbit COL9=P2^4;
sbit COL10=P2^5;
sbit COL11=P2^6;
sbit COL12=P2^7;

// 定义矩阵开关的状态数组
unsigned char matrix[ROWS][COLS];

// 初始化矩阵开关的状态数组
void init_matrix(void)
{
    int i, j;
    for (i = 0; i < ROWS; i++)
    {
        for (j = 0; j < COLS; j++)
        {
            matrix[i][j] = 0;
        }
    }
}

// 设置矩阵开关某个位置的状态
void set_matrix(unsigned char row, unsigned char col, unsigned char state)
{
    matrix[row][col] = state;
}

// 获取矩阵开关某个位置的状态
unsigned char get_matrix(unsigned char row, unsigned char col)
{
    return matrix[row][col];
}

// 扫描矩阵开关，并更新状态数组
void scan_matrix(void)
{
    int i, j;
    for (i = 0; i < ROWS; i++)
    {
        switch (i)
        {
            case 0:
                ROW1 = 0;
                ROW2 = 1;
                ROW3 = 1;
                ROW4 = 1;
                break;
            case 1:
                ROW1 = 1;
                ROW2 = 0;
                ROW3 = 1;
                ROW4 = 1;
                break;
            case 2:
                ROW1 = 1;
                ROW2 = 1;
                ROW3 = 0;
                ROW4 = 1;
                break;
            case 3:
                ROW1 = 1;
                ROW2 = 1;
                ROW3 = 1;
                ROW4 = 0;
                break;
            default:
                break;
        }
        for (j = 0; j < COLS; j++)
        {
            switch (j)
            {
                case 0:
                    set_matrix(i, j, COL1);
                    break;
                case 1:
                    set_matrix(i, j, COL2);
                    break;
                case 2:
                    set_matrix(i, j, COL3);
                    break;
                case 3:
                    set_matrix(i, j, COL4);
                    break;
                case 4:
                    set_matrix(i, j, COL5);
                    break;
                case 5:
                    set_matrix(i, j, COL6);
                    break;
                case 6:
                    set_matrix(i, j, COL7);
                    break;
                case 7:
                    set_matrix(i, j, COL8);
                    break;
                case 8:
                    set_matrix(i, j, COL9);
                    break;
                case 9:
                    set_matrix(i, j, COL10);
                    break;
                case 10:
                    set_matrix(i, j, COL11);
                    break;
                case 11:
                    set_matrix(i, j, COL12);
                    break;
                default:
                    break;
            }
        }
    }
}

void main()
{
    init_matrix();
    while (1)
    {
        scan_matrix();
        // 在这里可以根据需要对矩阵开关的状态数组进行处理
    }
}

注意，这个程序使用了单片机的IO口来控制矩阵开关，如果需要在其他平台上实现，需要根据具体情况进行修改。