我正在正方形框架中制作分形(Mandelbrot和BuddaBrot的)的bmp图像,如果将宽度设置为1000像素,没问题,但是如果将其宽度增加到2000,则在程序的第一行会出现分割错误。发生了什么。
这是我的代码:
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <math.h>
#include <time.h>
...
#define HEIGHT 2000
#define WIDTH 2000
typedef struct _pixel{
unsigned char blue;
unsigned char green;
unsigned char red;
}pixel;
typedef pixel screen[WIDTH][HEIGHT];
typedef struct _frame{
pair width;
pair height;
}frame;
void printPixel(screen view);
void editPixel(screen view, int row, int col, pixel p);
void blankScreen(screen view);
int main(int argc, const char * argv[])
{
FILE *out;
out = fopen("Out.bmp", "w");
int localHeight = HEIGHT - HEIGHT%4;
int localWidth = WIDTH - WIDTH%4;
frame myFrame = getFrame(localWidth,localHeight);
assert((myFrame.height.small+myFrame.height.big*256)==HEIGHT - HEIGHT%4);
assert((myFrame.width.small+myFrame.width.big*256)== WIDTH - WIDTH%4);
unsigned char bmp[] = {
0x42,0x4D,0x5A,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x3C,0x00,0x00,0x00,0x28,0x00,
0x00,0x00,myFrame.width.small,myFrame.width.big,0x00,0x00,
myFrame.height.small,myFrame.height.big,
0x00,0x00,0x01,0x00,0x18,0x00,0x00,0x00,
0x00,0x00,0x24,0x00,0x00,0x00,0x13,0x0B,
0x00,0x00,0x13,0x0B,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x99,
0x00,0x00,0x00,0x00,};
//Write the header
fwrite(bmp, 1, sizeof(bmp), out);
screen view;
blankScreen(view); //clears the image to a blank
printPixel(view); // this gets the image
fwrite(view, 1, sizeof(screen), out); //writes the image
fclose(out); //closes the file
return EXIT_SUCCESS;
}
最佳答案
由于堆栈无法分配,因此无法在堆栈上分配2000 * 2000 pixel
(screen view;
行),从而导致堆栈溢出。动态分配内存(使用malloc
)。
pixel * view;
view = malloc(sizeof(pixel) * HEIGHT * WIDTH);
if (view == NULL) return 1; //failed to allocate
// change those two functions to handle a "pixel *" instead of pixel[HEIGHT][WIDTH]
blankScreen(view);
printPixel(view);
关于c - C中的bmp段错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/13105529/