搜索链表,打印不对,输一个名字,其他的都跟着出来了
#include<winuser.inl>#include<stdio.h>
#include <cstdlib>
#include<string.h>
//输入学生以及每个学生的姓名成绩
//输入学生姓名,显示成绩,
//用头插法向链表里面添加元素
void getInput(struct Student* stu);
void printfInfo(struct Student* head);
void releaseMemory(struct Student** head);
void head_add(struct Student** head);
struct Student
{
char name;
int score;
struct Student* next;
};
void getInput(struct Student* stu)
{
printf("name:");
scanf_s("%s", stu->name, 20);
printf("score:");
scanf_s("%d", &stu->score);
}
void printfInfo(struct Student *head)
{
struct Student* stu;
stu = head;
while (stu != NULL)
{
printf("name: %s \n", stu->name);
printf("score:%d \n", stu->score);
stu = stu->next;
}
}
void search_stu(struct Student** head, char name[])
{
struct Student* stu, * temp;
stu = *head;
int sign = 0;
if (stu == NULL)
{
printf("there is no student!\n");
}
else
{
while (stu != NULL & sign != 1)
{
if (!strcmp(stu->name, name))
{
printfInfo(stu);
sign = 1;
break;
}
else
{
stu = stu->next;
}
};
if (sign == 0)
{
printf("not found!\n");
}
}
}
void releaseMemory(struct Student** head)
{
struct Student* stu, * temp;
stu = *head;
while (stu != NULL)
{
temp = stu;
stu = stu->next;
free(temp);
}
}
void head_add(struct Student** head)
{
struct Student* stu, * temp;
stu = (struct Student*)(malloc(sizeof(struct Student)));
if (stu == NULL)
{
printf("memory failed");
exit(1);
}
getInput(stu);
if (*head != NULL)//不是空链表
{
temp = *head;
*head = stu;
stu->next = temp;
}
else
{
*head = stu;
stu->next = NULL;
}
}
int main()
{
struct Student* namelist = NULL;////初始化一个指针,头指针,相当于定义了一个空的单链表
//struct Student* stu = NULL;
int num;
printf("total num of stu:");
scanf_s("%d", &num);
printf("\n");
printf("enter info:\n");
for (int i = 0; i < num; i++)
{
head_add(&namelist);
}
printf("finish entering!\n");
//printf("begining to print\n");
//printfInfo(&namelist);
char name;
do
{
printf("enter the name you want to search:('#'表示结束)");
scanf_s("%s",name,20);
search_stu(&namelist, name);
} while (name != '#');
releaseMemory(&namelist);
return 0;
} 本帖最后由 jackz007 于 2021-1-2 15:27 编辑
void search_stu(struct Student** head, char name[])
. . . . . .
while (stu != NULL & sign != 1) // 错误
{
if (!strcmp(stu->name, name))
{
printfInfo(stu); // 错误
改为
void search_stu(struct Student** head, char name[])
. . . . . .
while (stu != NULL && sign != 1) // 修改
{
if (!strcmp(stu->name, name))
{
printf("name: %s \n", stu->name); // 修改
printf("score:%d \n", stu->score) ; // 修改
此外
printf("enter the name you want to search:('#'表示结束)");
fflush(stdin) ; // 添加此句,清除键盘缓冲区中滞留的 '\n' 字符,否则,后面的 name != '#' 判断极有可能失效
scanf("%s",name);
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