【发布时间】:2019-09-29 13:24:19
【问题描述】:
我尝试创建一个函数来从文本文件中获取数字并计算不重叠且不超过某个数字的数字。我要把它放在链表中。计算一个与创建链表不重叠的数字是一件好事,但是计算超过某个数字的数字就有问题了。它比原来的数字少。在 Excel 中,应该会出现一些数字,但在我制作的 C 程序函数的情况下,它们会小于那个数字。
void GetData(headNode* rheadnode)
{
int dataType;
int newData;
FILE* fp = NULL;
fp = fopen("input.txt", "r");
if (fp != NULL) {
while (fscanf(fp, "%d", &newData) != EOF)
{
dataType = InsertNode(rheadnode, newData);
if (newData > 5000)
Data_morethan5000_Count++;
switch (dataType)
{
case 0:
break;
case 1:
NodeCount++;
}
}
fclose(fp);
}
}
上面的代码是整个程序代码的一部分。我正在使用一种方法从 input.txt 文件中获取一个数字,将其放入 newData 变量中,如果超过 5000,则增加 Data_morethan5000_Count 的值。 所以结果应该是45460。但是,C程序输出的结果值是45432。我想知道数据丢失发生在哪里。 以下是全部代码。
#include<stdio.h>
#include<stdlib.h>
typedef struct Node {
int key;
struct Node* link;
} listNode;
typedef struct Head {
struct Node* head;
}headNode;
int NodeCount = 0;
int Data_morethan5000_Count = 0;
headNode* initialize(headNode* rheadnode);
int DeleteList(headNode* rheadnode);
void GetData(headNode* rheadnode);
int InsertNode(headNode* rheadnode, int key);
void PrintResult(headNode* rheadnode);
int main()
{
int key;
headNode* headnode = NULL;
headnode = initialize(headnode);
GetData(headnode);
PrintResult(headnode);
DeleteList(headnode);
return 0;
}
headNode* initialize(headNode* rheadnode) {
headNode* temp = (headNode*)malloc(sizeof(headNode));
temp->head = NULL;
return temp;
}
int DeleteList(headNode* rheadnode) {
listNode* p = rheadnode->head;
listNode* prev = NULL;
while (p != NULL) {
prev = p;
p = p->link;
free(prev);
}
free(rheadnode);
return 0;
}
void GetData(headNode* rheadnode)
{
int dataType;
int newData;
FILE* fp = NULL;
fp = fopen("input.txt", "r");
if (fp != NULL) {
while (fscanf(fp, "%d", &newData) != EOF)
{
dataType = InsertNode(rheadnode, newData);
if (newData > 5000)
Data_morethan5000_Count++;
switch (dataType)
{
case 0:
break;
case 1:
NodeCount++;
}
}
fclose(fp);
}
}
int InsertNode(headNode* rheadnode, int key) {
listNode* search, * previous;
listNode* node = (listNode*)malloc(sizeof(listNode));
node->key = key;
search = rheadnode->head;
previous = NULL;
while (search != NULL)
{
if (node->key < search->key)
{
previous = search;
search = search->link;
}
else if (node->key == search->key)
return 0;
else
break;
}
if (previous == NULL)
{
node->link = rheadnode->head;
rheadnode->head = node;
}
else
{
node->link = search;
previous->link = node;
}
return 1;
}
void PrintResult(headNode* rheadnode) {
/*
The total number of nodes: 10011
More than 5000 values: 45460
Execution time: 1.234567 sec
*/
printf("The total number of nodes: %d\n", NodeCount);
printf("More than 5000 values: %d\n", Data_morethan5000_Count);
printf("Execution time: sec");
}
【问题讨论】:
标签: c count linked-list singly-linked-list