<分区>
当我使用我的添加功能输入数据时，我可以毫无问题地打印它们。为 start(x,y), end(x,y) 添加一个 vaule 有效，我能够打印这些值。但是当我指定我想要两个 numGraphicElements 时函数在输入第一组开始值和结束值后离开。第二次循环时，它会覆盖我以前的值。
当我打印值时，它出于某种原因用随机数覆盖我的第一个值，然后只显示第二组开始(x，y)结束(x，y)值。
第一组的例子:开始(1,2)结束(3,4)....这个打印正确
添加了第二组示例:start(9,8) end (6,7)...这也打印
示例 pf 一起打印出 2 个集合，x(23424), y(653243), end = x(2334) y(33434).....x(9) y(8) end x(3) y(4).
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <crtdbg.h>
#define _CRTDBG_MAP_ALLOC
enum
{
RUNNING = 1
};
struct Point
{
int x, y;
};
struct Line
{
Point start;
Point end;
};
struct GraphicElement
{
enum
{
SIZE = 256
};
unsigned int numLines; //number of lines
Line* pLines; //plines points to start and end
char name[SIZE];
};
typedef struct
{
unsigned int numGraphicElements;
GraphicElement* pElements; //the head points to pLines
} VectorGraphic;
void InitVectorGraphic(VectorGraphic*);
void AddGraphicElement(VectorGraphic*);
void ReportVectorGraphic(VectorGraphic*);
VectorGraphic Image;
int main()
{
char response;
InitVectorGraphic(&Image);
//for debugging purposes
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
//main menu for the program
while (RUNNING)
{
printf("\nPlease select an option:\n");
printf("1. Add a Graphic Element\n");
printf("2. List the Graphic Elements\n");
printf("q. Quit\n");
printf("CHOICE: ");
fflush(stdin);
scanf("%c", &response);
switch (response)
{
case '1':
AddGraphicElement(&Image);
break;
case '2':
ReportVectorGraphic(&Image);
break;
case 'q':
CleanUpVectorGraphic(&Image);
return 0;
default:
printf("Please enter a valid option\n");
}
printf("\n");
}
}
/*initialize the vectors, allocate memory*/
void InitVectorGraphic(VectorGraphic * pImage)
{ //addres of pImage is passed in
struct GraphicElement *pElements;
pImage->pElements = (GraphicElement*) malloc(sizeof(GraphicElement)); //pImage is now the addess of image
pElements = (GraphicElement*) malloc(sizeof(GraphicElement));
pImage->numGraphicElements = 8;
pImage->pElements = NULL;
}