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C stdlib calloc() 函数

❮ C stdlib 库


示例

分配内存并将一些值写入其中

// Allocate memory for a number of items
int numItems = 15;
int *myArray = calloc(numItems, sizeof(int));

// Write into the memory
for(int i = 0; i < numItems; i++) {
  myArray[i] = i + 1;
}

// Display the contents of the memory
for(int i = 0; i < numItems; i++) {
  printf("%d ", myArray[i]);
}

// Free the memory
free(myArray);
myArray = NULL;
自己尝试 »

定义和用法

calloc() 函数分配内存,用零填充它,并返回指向它的指针。

calloc() 函数在 <stdlib.h> 头文件中定义。

要了解更多关于内存分配的信息,请查看我们的 C 内存管理教程.


语法

calloc(size_t amount, size_t size);

size_t 数据类型是一个非负整数。

参数值

参数 描述
amount 指定要为其分配内存的项目数量。
size 指定每个项目的大小(以字节为单位)。

技术细节

返回值 一个 void * 指向新分配的内存块的指针。

❮ C stdlib 库

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