我的 fread 程序出了什么问题？
我正在从二进制文件中读取内容。如果我以 char 形式读入数据元素，则不会收到任何 malloc 错误，但如果我以任何其他数据类型（例如短整型或 int）读入，程序会成功读入字节，但是当我 free 我得到的指针这可能是由于堆损坏造成的。有人能告诉我我做错了什么吗？
代码：
#include <stdio.h>
#include <stdlib.h>
#define TYPE int //char or short
int main () {
FILE * pFile;
long lSize;
TYPE * buffer;
size_t result;
pFile = fopen ( "4.bin" , "rb" );
if (pFile==NULL) {fputs ("File error",stderr); exit (1);}
// obtain file size:
fseek (pFile , 0 , SEEK_END);
lSize = ftell (pFile);
rewind (pFile);
// allocate memory to contain the whole file:
buffer = (TYPE*) malloc (lSize/sizeof(TYPE));
if (buffer == NULL) {fputs ("Memory error",stderr); exit (2);}
// copy the file into the buffer:
result = fread (buffer,sizeof(TYPE),lSize/sizeof(TYPE),pFile);
if (result != lSize/sizeof(TYPE)) {fputs ("Reading error",stderr); exit (3);}
perror("This is the problem: ");
/* the whole file is now loaded in the memory buffer. */
// terminate
fclose (pFile);
free (buffer); // free causes heap related issue
return 0;
}
I'm reading contents from a binary file. If I read in data elements as char I don't get any malloc errors, but if I read in as any other data types, say short or int, the program successfully reads in the bytes but when I free the pointer I get This may be due to a corruption of the heap. Can someone tell me what wrong I'm doing?
The code:
#include <stdio.h>
#include <stdlib.h>
#define TYPE int //char or short
int main () {
FILE * pFile;
long lSize;
TYPE * buffer;
size_t result;
pFile = fopen ( "4.bin" , "rb" );
if (pFile==NULL) {fputs ("File error",stderr); exit (1);}
// obtain file size:
fseek (pFile , 0 , SEEK_END);
lSize = ftell (pFile);
rewind (pFile);
// allocate memory to contain the whole file:
buffer = (TYPE*) malloc (lSize/sizeof(TYPE));
if (buffer == NULL) {fputs ("Memory error",stderr); exit (2);}
// copy the file into the buffer:
result = fread (buffer,sizeof(TYPE),lSize/sizeof(TYPE),pFile);
if (result != lSize/sizeof(TYPE)) {fputs ("Reading error",stderr); exit (3);}
perror("This is the problem: ");
/* the whole file is now loaded in the memory buffer. */
// terminate
fclose (pFile);
free (buffer); // free causes heap related issue
return 0;
}
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malloc将大小（以字节为单位）作为参数，因此该行应为
malloctakes a size in bytes as a parameter, so the lineshould read