An example of interference between adjacent variables
2003-5-3
Example of program:
Void main () {char Addra [5], addrb [5]; Printf ("THE ADDRA); Printf (" The Address of Addra [4] IS:% D / N ", & addra [4]); Printf (" THE Address of Addrb IS:% D / N ", & Addrb); Printf (" "The Address of AddrB [4] IS:% D / N", & Addrb [4]); Scanf ("% s", addra); scanf ("% s", addrb); Printf ("AddRA:% S / N", AddRA); Printf ("ADDRB:% S / N", AddRB);}
translater
GNU C
Operating platform:
Win2000
operation result:
the address of addrA is: 2293616the address of addrA [4] is: 2293620the address of addrB is: 2293600the address of addrB [4] is: 2293604abcdabcdefghijklmnopqrstuvwxtyzladdrA: qrstuvwxtyzladdrB: abcdefghijklmnopqrstuvwxtyzl
Some conclusions:
1. The system is sequentially allocated from the high address in the order of the variable.
2, the two variables retain 12 bytes of buffers.
3. The C / C language does not check the boundary of the array, which is the root cause of the error.
