c - 错误 : warning: incompatible implicit declaration of built-in function ‘memcpy’ [enabled by default]

Question

我收到这个错误。

error: warning: incompatible implicit declaration of built-in function ‘memcpy’ [enabled by default]

这是代码:

int arr[ 12] = {1,0,0,0,0,0,0,0,0,0,9370, 0};
void *a = &arr;
memcpy(machine->mem, a,12*4);

我做错了什么？

Answer 1

您可能忘记包含 <string.h> .

添加#include <string.h>到文件的顶部。