我有一个学校项目,我需要让用户选择按数字或字母顺序对两名学生进行排序。我已经设法做了第一个(数字顺序),但我无法理解我如何按字母顺序排序。
学生的名字由用户提供,并存储在结构中。当我尝试使用时:
if (strcmp((number_name_surname[0].name), (number_name_surname[1].name) < 0));
我得到错误'类型为“bool”的参数与“const char *”类型的参数不兼容。
这是结构
typedef struct
{
int number;
char name[10];
char surname[10];
}num_nom_surname;
num_nom_surname *number_name_surname;
这是按字母顺序
if(number_name_surname[0].number > number_name_surname[1].number)
{
for (i = number_of_students - 1; i >= 0; i--)
{
printf("\n Student N%c %5d - ", 167, number_name_surname[i].number);
printf("Name: %s %s", number_name_surname[i].name, number_name_surname[i].surname);
}
}
else
{
for (i = 0; i < number_of_students; i++)
{
printf("\n Student N%c %5d - ", 167, number_name_surname[i].number);
printf("Name: %s %s", number_name_surname[i].name, number_name_surname[i].surname);
}
}
这是我需要帮助的人
if (strcmp((number_name_surname[0].name), (number_name_surname[1].name) < 0));
{
}
//编辑//
所以现在我已经完成了,我有另一个问题。 为了按字母顺序打印名称,我需要确保名字不同。 例如:
如果名字是: Mark Adele ,第二个名字是: Mark Boy ,我该如何按顺序打印?
以下是代码:
if (strcmp((number_name_surname[0].name), (number_name_surname[1].name)) < 0)
{
for (i = 0; i < number_of_students; i++)
{
printf("\n Student N%c %5d - ", 167, number_name_surname[i].number);
printf("Name: %s %s", number_name_surname[i].name, number_name_surname[i].surname);
}
}
else
{
for (i = number_of_students - 1; i >= 0; i--)
{
printf("\n Student N%c %5d - ", 167, number_name_surname[i].number);
printf("Name: %s %s", number_name_surname[i].name, number_name_surname[i].surname);
}
}
printf("\n Value of strcmp: %d", strcmp((number_name_surname[0].name), (number_name_surname[1].name)));
答案 0 :(得分:2)
您的括号已关闭,您已
if (strcmp((number_name_surname[0].name), (number_name_surname[1].name) < 0))
但你需要;
if (strcmp((number_name_surname[0].name), (number_name_surname[1].name)) < 0)
答案 1 :(得分:2)
如有疑问,请简化。
char* name1 = number_name_surname[0].name;
char* name2 = number_name_surname[1].name;
int res = strcmp(name1, name2);
if (res < 0)
{
...
}