在嵌入式開發中，因為只有黑框框的終端，所以在終端輸入指令是比較麻煩的，每次都需要重新實現解析字符串。

本篇文章分享一個自己常用的一套終端菜單系統。

代碼如下：

#include 
#include 
#include 


typedef enum CmdType
{
    CMD1, CMD2, CMD3, CMD4, CMD5, QUIT
}CmdType;


typedef struct CmdList
{
    CmdType type;
    unsigned char info[50];
}CmdList;


CmdList g_cmd_list[] =
{
    {CMD1, "run cmd1"},
    {CMD2, "run cmd2"},
    {CMD3, "run cmd3"},
    {CMD4, "run cmd4"},
    {CMD5, "run cmd5"},
    {QUIT, "to quit"},
};


void printf_cmd_str()
{
    int size = sizeof(g_cmd_list) / sizeof(g_cmd_list[0]);
    printf("support cmd:\\n");
    for (int i = 0; i < size; i++) {
        printf("    .%d-->%s\\n", i, g_cmd_list[i].info);
    }
    printf("eg. you can input \".0\" to run this cmd.\\n");
}


int main(int argc, char *argv[])
{
    int cmd_size = sizeof(g_cmd_list) / sizeof(g_cmd_list[0]);
    while (1) {
        printf_cmd_str();
        char data[20] = {0};
        if (fgets(data, 20, stdin) < 0) {
            printf("fgets error\\n");
            continue;
        }
        if (data[0] == '.') {
            int id = atoi(&data[1]);
            if (id >= cmd_size || id < 0) {
                printf("input err\\n");
                continue;
            }
            int cmd = g_cmd_list[id].type;
            if (cmd == CMD1) {
                printf("run cmd1\\n");
            }
            else if (cmd == CMD2) {
                printf("run cmd2\\n");
            }
            else if (cmd == CMD3) {
                printf("run cmd3\\n");
            }
            else if (cmd == CMD4) {
                printf("run cmd4\\n");
            }
            else if (cmd == CMD5) {
                printf("run cmd5\\n");
            }
            else if (cmd == QUIT) {
                printf("to quit\\n");
                break;
            }
            else {
                printf("this cmd is not supported\\n");
            }
        }
        else {
            printf("input invalid\\n");
        }
    }


    return 0;
}

運行結果如下：

****@****:~/zcl$ ./a.out 
support cmd:
    .0-->run cmd1
    .1-->run cmd2
    .2-->run cmd3
    .3-->run cmd4
    .4-->run cmd5
    .5-->to quit
eg. you can input ".0" to run this cmd.
.0
run cmd1
support cmd:
    .0-->run cmd1
    .1-->run cmd2
    .2-->run cmd3
    .3-->run cmd4
    .4-->run cmd5
    .5-->to quit
eg. you can input ".0" to run this cmd.
.5
to quit
****@****:~/zcl$

審核編輯：劉清