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請選定要查看的函數
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<ul>
<li><a href="calloc.html">calloc</a></li>
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<li><a href="free.html">free</a></li>
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<li><a href="malloc.html">malloc</a></li>
<li><a href="realloc.html">realloc</a></li>
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<td>目前共有4個函數</td>
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<tr><td height=62 valign=bottom><b><font size=5>free</font></b></td></tr>
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<pre>
原型：extern void free(void *p);
用法：#include <alloc.h>
功能：釋放指針p所指向的的內存空間。
說明：p所指向的內存空間必須是用calloc,malloc,realloc所分配的內存。
如果p為NULL或指向不存在的內存塊則不做任何操作。
舉例：
// free.c
#include <syslib.h>
#include <alloc.h>
main()
{
char *p;
clrscr(); // clear screen
textmode(0x00);
p=(char *)malloc(100);
if(p)
printf("Memory Allocated at: %x",p);
else
printf("Not Enough Memory!\n");
getchar();
free(p); // release memory to reuse it
p=(char *)calloc(100,1);
if(p)
printf("Memory Reallocated at: %x",p);
else
printf("Not Enough Memory!\n");
free(p); // release memory at program end
getchar();
return 0;
}
相關函數：<a href="calloc.html">calloc</a>,<a href="malloc.html">malloc</a>,<a href="realloc.html">realloc</a>
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