优化这段代码 if (draw == k+1) { if( k == 0 ) { if (gRunPara.COMMS_SerialInfo[serialid][k].val<8) ++gRunPara.COMMS_SerialInfo[serialid][k].val; change = 1; } else if( k == 1 ) { if (gRunPara.COMMS_SerialInfo[serialid][k].val<9) ++gRunPara.COMMS_SerialInfo[serialid][k].val; change = 1; } else if( k == 2 || k == 7 || k == 18 ) { if (gRunPara.COMMS_SerialInfo[serialid][k].val<2) ++gRunPara.COMMS_SerialInfo[serialid][k].val; change = 1; } else if( k == 6 || k == 8 ) { if (gRunPara.COMMS_SerialInfo[serialid][k].val<2) ++gRunPara.COMMS_SerialInfo[serialid][k].val; change = 1; } else if( k == 3 || k == 13 || k == 14 || k == 16 || k == 20 || k == 21 ) { if (gRunPara.COMMS_SerialInfo[serialid][k].val<1) ++gRunPara.COMMS_SerialInfo[serialid][k].val; change = 1; } else if( k == 15 || k == 17) { if (gRunPara.COMMS_SerialInfo[serialid][k].val<2) ++gRunPara.COMMS_SerialInfo[serialid][k].val; change = 1; } else change = Lcd_Modify_Param(LCD_KEY_ADD,ALTER_SERI,UNIT_PUBLIC_MX6,serialid,k,j); }

可以考虑使用一个表格来简化这段代码，类似于以下形式：

k     val_max     val_step
--------------------------
0     8           1
1     9           1
2     2           1
3     1           1
...

其中，`val_max` 表示 `gRunPara.COMMS_SerialInfo[serialid][k].val` 的最大值，`val_step` 表示每次增加的步长。

然后可以用一个循环来遍历这个表格，根据 `k` 的值来判断应该采用哪一行规则进行处理。如果没有匹配到任何一行，再执行 `else` 分支。

这样就可以将原来的多个 `if-else` 分支简化为一个循环，使代码更加简洁和易于维护。

相关问题

优化这段代码 if(gRunPara.COMMS_SerialInfo[serialid][i].val == 0) LCD_DisString((i%9)+1, 15, (char *)"退出"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 1) LCD_DisString((i%9)+1, 15, (char *)"101平"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 2) LCD_DisString((i%9)+1, 15, (char *)"101非"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 3) LCD_DisString((i%9)+1, 15, (char *)"104"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 4) LCD_DisString((i%9)+1, 15, (char *)"CDT"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 5) LCD_DisString((i%9)+1, 15, (char *)"DNP3.0"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 6) LCD_DisString((i%9)+1, 15, (char *)"MudBus"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 7) LCD_DisString((i%9)+1, 15, (char *)"GSM"); else if(gRunPara.COMMS_SerialInfo[serialid][i].val == 8) LCD_DisString((i%9)+1, 15, (char *)"线损通讯");

可以将不同的 val 值对应的字符串保存在一个数组中，然后使用 val 值作为索引来获取对应的字符串，从而避免大量的重复代码。示例如下：

char* comms_strings[] = {"退出", "101平", "101非", "104", "CDT", "DNP3.0", "MudBus", "GSM", "线损通讯"};
LCD_DisString((i%9)+1,  15, comms_strings[gRunPara.COMMS_SerialInfo[serialid][i].val]);

优化这段代码 if( i == 0 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdComPcl[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 1 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdComBaud[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 2 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszComParity[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 3 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszStateName1[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 13 || i == 14) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszPoint[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 15 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszData[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 16 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdJmMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 17 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdAreaMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 20 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdSynctmMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); } else if( i == 21 ) { LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdRSMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]); }

可以将这段代码进行优化，使用一个 switch case 语句来替代多个 if else 语句。具体实现代码如下：

switch (i) {
    case 0:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdComPcl[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 1:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdComBaud[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 2:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszComParity[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 3:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszStateName1[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 13:
    case 14:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszPoint[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 15:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszData[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 16:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdJmMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 17:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdAreaMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 20:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdSynctmMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    case 21:
        LCD_DisString_Not((i%9)+1, 15, (char *)gcszLcdRSMode[(int)gRunPara.COMMS_SerialInfo[serialid][i].val]);
        break;
    default:
        break;
}

使用 switch case 语句可以让代码更加简洁明了，易于维护和修改。