c - 如何从 C 中的 "raw"内存中读取/写入类型值？

Question

我该如何做这样的事情？

void *memory = malloc(1000);  //allocate a pool of memory
*(memory+10) = 1;  //set an integer value at byte 10
int i = *(memory+10);  //read an integer value from the 10th byte

Answer 1

简单示例:将内存视为无符号字符数组

void *memory = malloc(1000);  //allocate a pool of memory
uint8_t *ptr = memory+10;  
*ptr = 1 //set an integer value at byte 10
uint8_t i = *ptr;  //read an integer value from the 10th byte

您也可以使用整数，但是您必须注意一次设置的字节数。