C语言作业，急！急！急！，为什么这个程序不能一直运行

Question

为什么这个程序不能一直运行呢

do {
        printf("please input a choice,o to input data,s to sort,e to exit:\n");
        scanf("%c",&ch);
        switch (ch)
        {
         case 'e':printf("the process is over,goobye.");
            break;
         case 'o':
            for (i = 0; i < 10; ++i)
            {
                printf("Please enter the data,if you want to end the input process, please input #:");
                scanf("%s", &str[i]);
                if (strcmp(str[i], "#") == 0)
                {
                    k = i;
                    break;
                }
            }
            break;
            case 's':
                    for (i = 0; i < k; ++i)
                    {
                        for (j = i + 1; j < k; ++j)
                        {
                            if (strcmp(str[i], str[j]) > 0)
                                strcpy(str[i], str[j]);
                        }
                    }
                    printf("the sort data:\n");
                    for (i = 0; i < k; ++i)
                    {
                        printf("%s\n", str[i]);
                    }
                    break;
        }
    }while (strcmp(ch , "o")==0 || strcmp(ch , "e")==0);

Answer 1

字符比较不要用strcmp
do
->
while (1)

while (strcmp(ch , "o")==0 || strcmp(ch , "e")==0); 这个去掉