Test writing data to memory

A = * p = & * q = (*); printf (, & printf (, * printf (, ** q =; printf (, * printf (}

Running result:

Analysis:

A is an int variable whose address is 0x18FEF0. * p points to this address, which is equivalent to a new name named P for this address. The memory value is not changed, therefore, * p = 0. Set * q address to 0x18FEF0 and write data 3 to the memory, changing the value of the memory. A is actually another name of 0x18FEF0. The value on 0x18FEF0 has changed, so the value of a is 3.