Stack growth direction and memory growth direction

1. The growth direction of the stack

Stack growth from high to low

2. Memory growth direction

Small end alignment  ： The low byte is placed at the low address , The high byte is placed at the high address （ many ）

Big end alignment  ： Put the high byte in the low address , Put the low byte in the high address （ The server ）

Sample code ：

//1. The growth direction of the stack void test01(){ int a = 10; int b = 20; int c = 30; int d = 40; printf("a = %d\n", &a); printf("b = %d\n", &b); printf("c = %d\n", &c); printf("d = %d\n", &d); //a The address of is greater than b The address of , Therefore, the growth direction is downward } //2. Memory growth direction ( The small end model ) void test02(){ // High byte -> Status byte int num = 0xaabbccdd; unsigned char* p = # // The first byte from the first address printf("%x\n",*p); printf("%x\n", *(p + 1)); printf("%x\n", *(p + 2)); printf("%x\n", *(p + 3)); }