OLED标准ASCII字符串显示函数重定义的问题

如下图所示，是一组显示6*8一组标准ASCII字符串 显示的坐标（x,y），y为页范围0～7的代码

}

我现在要显示一个四位数，比如1234，我现在能想到的方法是一位一位显示，比如在（24,0）显示千位“1”，在（30,0）显示百位“2”，在（36,0）显示十位“3”，在（42,0）显示个位“4”；

具体代码实现如下：

sswitch(InputVoltage/1000) //千位
{
case 0: OLED_P6x8Str(24+x,0+y,"0");break;
case 1: OLED_P6x8Str(24+x,0+y,"1");break;
case 2: OLED_P6x8Str(24+x,0+y,"2");break;
case 3: OLED_P6x8Str(24+x,0+y,"3");break;
case 4: OLED_P6x8Str(24+x,0+y,"4");break;
case 5: OLED_P6x8Str(24+x,0+y,"5");break;
case 6: OLED_P6x8Str(24+x,0+y,"6");break;
case 7: OLED_P6x8Str(24+x,0+y,"7");break;
case 8: OLED_P6x8Str(24+x,0+y,"8");break;
case 9: OLED_P6x8Str(24+x,0+y,"9");break;
default:break;
}
switch((InputVoltage%1000)/100) //百位
{
case 0: OLED_P6x8Str(30+x,0+y,"0");break;
case 1: OLED_P6x8Str(30+x,0+y,"1");break;
case 2: OLED_P6x8Str(30+x,0+y,"2");break;
case 3: OLED_P6x8Str(30+x,0+y,"3");break;
case 4: OLED_P6x8Str(30+x,0+y,"4");break;
case 5: OLED_P6x8Str(30+x,0+y,"5");break;
case 6: OLED_P6x8Str(30+x,0+y,"6");break;
case 7: OLED_P6x8Str(30+x,0+y,"7");break;
case 8: OLED_P6x8Str(30+x,0+y,"8");break;
case 9: OLED_P6x8Str(30+x,0+y,"9");break;
default:break;
}
switch((InputVoltage%100)/10) //十位
{
case 0: OLED_P6x8Str(36+x,0+y,"0");break;
case 1: OLED_P6x8Str(36+x,0+y,"1");break;
case 2: OLED_P6x8Str(36+x,0+y,"2");break;
case 3: OLED_P6x8Str(36+x,0+y,"3");break;
case 4: OLED_P6x8Str(36+x,0+y,"4");break;
case 5: OLED_P6x8Str(36+x,0+y,"5");break;
case 6: OLED_P6x8Str(36+x,0+y,"6");break;
case 7: OLED_P6x8Str(36+x,0+y,"7");break;
case 8: OLED_P6x8Str(36+x,0+y,"8");break;
case 9: OLED_P6x8Str(36+x,0+y,"9");break;
default:break;
}
switch(InputVoltage%10) //个位
{
case 0: OLED_P6x8Str(42+x,0+y,"0");break;
case 1: OLED_P6x8Str(42+x,0+y,"1");break;
case 2: OLED_P6x8Str(42+x,0+y,"2");break;
case 3: OLED_P6x8Str(42+x,0+y,"3");break;
case 4: OLED_P6x8Str(42+x,0+y,"4");break;
case 5: OLED_P6x8Str(42+x,0+y,"5");break;
case 6: OLED_P6x8Str(42+x,0+y,"6");break;
case 7: OLED_P6x8Str(42+x,0+y,"7");break;
case 8: OLED_P6x8Str(42+x,0+y,"8");break;
case 9: OLED_P6x8Str(42+x,0+y,"9");break;
default:break;
}

感觉这样写的话，一两个参数还好，如果参数多了，就有点费代码了，那么问题来了：

能不能将void OLED_P6x8Str(unsigned char x, y,unsigned char ch[])重定义，让我能直接​OLED_P6x8Str(24+x,0+y,InputVoltage)​这样写就能在（24,0）开始到（41,0）的位置直接显示“1234”呢，这个函数要怎么改？