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我在打印節點的id成員變量時得到了這段代碼和一個奇怪的行爲。打印後結構成員的值發生變化C
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct node
{
int id;
int visited;
// struct node *neighbors_[];
};
struct graph
{
struct node nodes[26];
int adjMat[26][26];
};
struct stack_item
{
struct node node;
struct stack_item *next_;
};
struct myStack
{
struct stack_item *anfang_;
};
void initGraph(struct graph *graph_);
void push(struct myStack *stack_, struct node node);
int main()
{
struct graph graph;
struct myStack stack;
char ausgabe[26]="";
initGraph(&graph);
//READ DATA
char line[200];
int firstTime=1,first;
first=0;
push(&stack,graph.nodes[first]);
printf("ID %i\n",stack.anfang_->node.id);
printf("ID %i\n",stack.anfang_->node.id);
//FINISHED DATA READING
//CALL DFS
//dfs(graph,stack,ausgabe);
}
void push(struct myStack *stack_, struct node node)
{
struct stack_item item;
item.node=node;
item.next_=stack_->anfang_;
stack_->anfang_=&item;
}
void initGraph(struct graph *graph_)
{
int i,j;
for(i=0; i<26; i++)
{
struct node node= {i,0};
graph_->nodes[i]=node;
for(j=0; j<26; j++)
{
graph_->adjMat[i][j]=0;
}
}
}
如果我執行此,第一打印命令導致 'ID 0',第二爲 'ID 1980796117'。如何通過打印來改變這個值?可以請任何人幫助我,我真的不知道!
您可以將代碼剝離到發生這種情況的最簡單情況嗎? – Isaac