之前的文章【参考1】，介绍了 ASCII 的字体，这次用这个实现在 Console 下显示数值。使用 VS2019 VC 编译通过。
运行结果如下：
测试代码如下：
// AsciiFontTest.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <windows.h> // 必须包含头文件
#include <iostream>
// 字体宽度
#define DOHWIDTH 20
#define DOHHEIGHT 16
// 定义二维数组，每行预留足够空间
char DOH[10][DOHHEIGHT*10][DOHWIDTH+1] = {
// char "0"
{
" 000000000 ",
" 00:::::::::00 ",
" 00:::::::::::::00 ",
"0:::::::000:::::::0 ",
"0::::::0 0::::::0 ",
"0:::::0 0:::::0 ",
"0:::::0 0:::::0 ",
"0:::::0 000 0:::::0 ",
"0:::::0 000 0:::::0 ",
"0:::::0 0:::::0 ",
"0:::::0 0:::::0 ",
"0::::::0 0::::::0 ",
"0:::::::000:::::::0 ",
" 00:::::::::::::00 ",
" 00:::::::::00 ",
" 000000000 "
},
// char "1"
{
" 1111111 ",
" 1::::::1 ",
" 1:::::::1 ",
" 111:::::1 ",
" 1::::1 ",
" 1::::1 ",
" 1::::1 ",
" 1::::l ",
" 1::::l ",
" 1::::l ",
" 1::::l ",
" 1::::l ",
" 111::::::111 ",
" 1::::::::::1 ",
" 1::::::::::1 ",
" 111111111111 "
},
// char "2"
{
" 222222222222222 ",
"2:::::::::::::::22 ",
"2::::::222222:::::2 ",
"2222222 2:::::2 ",
" 2:::::2 ",
" 2:::::2 ",
" 2222::::2 ",
" 22222::::::22 ",
" 22::::::::222 ",
" 2:::::22222 ",
"2:::::2 ",
"2:::::2 ",
"2:::::2 222222",
"2::::::2222222:::::2",
"2::::::::::::::::::2",
"22222222222222222222",
},
// char "3"
{
" 333333333333333 ",
"3:::::::::::::::33 ",
"3::::::33333::::::3 ",
"3333333 3:::::3 ",
" 3:::::3 ",
" 3:::::3 ",
" 33333333:::::3 ",
" 3:::::::::::3 ",
" 33333333:::::3 ",
" 3:::::3 ",
" 3:::::3 ",
" 3:::::3 ",
"3333333 3:::::3 ",
"3::::::33333::::::3 ",
"3:::::::::::::::33 ",
" 333333333333333 ",
},
// char "4"
{
" 444444444 ",
" 4::::::::4 ",
" 4:::::::::4 ",
" 4::::44::::4 ",
" 4::::4 4::::4 ",
" 4::::4 4::::4 ",
" 4::::4 4::::4 ",
" 4::::444444::::444 ",
" 4::::::::::::::::4 ",
" 4444444444:::::444 ",
" 4::::4 ",
" 4::::4 ",
" 4::::4 ",
" 44::::::44 ",
" 4::::::::4 ",
" 4444444444 ",
},
// char "5"
{
" 555555555555555555 ",
" 5::::::::::::::::5 ",
" 5::::::::::::::::5 ",
" 5:::::555555555555 ",
" 5:::::5 ",
" 5:::::5 ",
" 5:::::5555555555 ",
" 5:::::::::::::::5 ",
" 555555555555:::::5 ",
" 5:::::5",
" 5:::::5",
" 5555555 5:::::5",
" 5::::::55555::::::5",
" 55:::::::::::::55 ",
" 55:::::::::55 ",
" 555555555 ",
},
// char "6"
{
" 66666666 ",
" 6::::::6 ",
" 6::::::6 ",
" 6::::::6 ",
" 6::::::6 ",
" 6::::::6 ",
" 6::::::6 ",
" 6::::::::66666 ",
" 6::::::::::::::66 ",
" 6::::::66666:::::6 ",
" 6:::::6 6:::::6",
" 6:::::6 6:::::6",
" 6::::::66666::::::6",
" 66:::::::::::::66 ",
" 66:::::::::66 ",
" 666666666 ",
},
// char "7"
{
"77777777777777777777",
"7::::::::::::::::::7",
"7::::::::::::::::::7",
"777777777777:::::::7",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
" 7::::::7 ",
"77777777 ",
},
// char "8"
{
" 888888888 ",
" 88:::::::::88 ",
" 88:::::::::::::88 ",
" 8::::::88888::::::8",
" 8:::::8 8:::::8",
" 8:::::8 8:::::8",
" 8:::::88888:::::8 ",
" 8:::::::::::::8 ",
" 8:::::88888:::::8 ",
" 8:::::8 8:::::8",
" 8:::::8 8:::::8",
" 8:::::8 8:::::8",
" 8::::::88888::::::8",
" 88:::::::::::::88 ",
" 88:::::::::88 ",
" 888888888 "
},
// char "9"
{
" 999999999 ",
" 99:::::::::99 ",
" 99:::::::::::::99 ",
" 9::::::99999::::::9",
" 9:::::9 9:::::9",
" 9:::::9 9:::::9",
" 9:::::99999::::::9",
" 99::::::::::::::9",
" 99999::::::::9 ",
" 9::::::9 ",
" 9::::::9 ",
" 9::::::9 ",
" 9::::::9 ",
" 9::::::9 ",
" 9::::::9 ",
" 99999999 "
}
};
// 计算 n 的位数
// 比如： 123 返回2， 1 返回0
int count_digits(int n) {
// 处理特殊情况：0的位数为1
if (n == 0) return 0; // [^1]
int count = 0;
n = abs(n); // 处理负数
while (n != 0) {
n /= 10; // 每次循环移除最后一位
count++;
}
return count-1;
}
/**
* @brief 获取整数指定位的数字
* @param v 目标整数(支持负数)
* @param index 位索引（0表示个位，1表示十位，依此类推）
* @return int 对应位的数字（0-9）
*
* @example
* GetValueOf(1234, 0) -> 4
* GetValueOf(-987, 2) -> 9
*/
int GetValueOf(int v, int index) {
if (index < 0) return 0; // 非法索引处理
v = abs(v); // 处理负数情况[^1]
long long divisor = 1; // 使用long long防止溢出
for (int i = 0; i < index; ++i) {
divisor *= 10;
if (divisor > INT_MAX) return 0; // 大索引保护机制[^2]
}
return (v / divisor) % 10;
}
char* Int2Ascii(int value) {
// 计算最终的宽度
int StrWitdh = (count_digits(value)+1) * DOHWIDTH + 1; // 最后加入回车换行字符
char *str =(char*) malloc(StrWitdh * DOHHEIGHT + 1); //末尾使用 \0 作为标记
if (str == NULL) {
return NULL;
} else memset(str, '*', StrWitdh * DOHHEIGHT + 1);
str[StrWitdh * DOHHEIGHT + 1 - 1] = NULL;
// 赋值换行
for (int i = 1; i < DOHHEIGHT+1; i++) {
str[i * StrWitdh - 1] = '\n';
}
// 从 Value 的最高位开始搬移
for (int i = 0; i<count_digits(value)+1; i++)
{
printf("GetValueOf[%d,%d]=%d\n", value, count_digits(value) - i, GetValueOf(value,count_digits(value)-i));
for (int j = 0; j < DOHHEIGHT; j++) {
memcpy(&str[j* StrWitdh+ DOHWIDTH*i], &DOH[GetValueOf(value, count_digits(value)-i)][j][0], DOHWIDTH);
//printf("copy DOH[%d][%d][0] > str[%d]\n", GetValueOf(value, count_digits(value) - i), j, j * StrWitdh + DOHWIDTH * i);
}
}
return str;
}
int main()
{
for (int i = 0; i < 100; i++) {
char* p = Int2Ascii(i);
printf("%s\r\n", p);
free(p);
Sleep(500);
}
}
参考：