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40 lines
1.0 KiB
HTML
40 lines
1.0 KiB
HTML
<h1>动态内存 - calloc</h1>
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<p>原型：extern void *calloc(int num_elems, int elem_size);</p>
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<p>用法：#include <alloc.h></p>
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<p>功能：为具有num_elems个长度为elem_size元素的数组分配内存</p>
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<p>说明：如果分配成功则返回指向被分配内存的指针，否则返回空指针NULL。<br>
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当内存不再使用时，应使用free()函数将内存块释放。</p>
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举例：<pre><code class="language-c">
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// calloc.c
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#include <syslib.h>
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#include <alloc.h>
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main()
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{
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char *p;
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clrscr(); // clear screen
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p=(char *)calloc(100,sizeof(char));
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if(p)
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printf("Memory Allocated at: %x",p);
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else
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printf("Not Enough Memory!\n");
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free(p);
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getchar();
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return 0;
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}
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</code></pre>相关函数：<a href="free.html">free</a>,<a href="malloc.html">malloc</a>,<a href="realloc.html">realloc</a>
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