#include?
#define?P1?1
#define?P2?-1
#define?SIZE?3
#define?WIN?-1
#define?UNWIN?0
#define?PEACE?1
#define?chkAndPutDwnRow（row?col）{\
???for（col?=?0;?col??????????????if（chsman[row][col]?==?0）{\
?????????????????chsman[row][col]?=?P2;\
?????dsply（）;\
?????return;\
?????????????}\
?????????}\
??}
#define?chkAndPutDwnCol（row?col）{\
???for（col?=?0;?col??????????????if（chsman[col][row]?==?0）{\
?????????????????chsman[col][row]?=?P2;\
?????dsply（）;\
?????return;\
?????????????}\
?????????}\
??}
#define?chkAndPutDwn_Slsh（row?col）{\
???if（chsman[row][col]?==?0）{\
?????????????chsman[row][col]?=?P2;\
????dsply（）;\
????return;\
?????????}\
??}
int?chsman[SIZE][SIZE]?=?{0};
/*function?prototype?（declaration）.*/
int?enterChsman（int?int）;
void?dsply（void）;
void?input（void）;
void?judge（void）;
int?chkWin（void）;
int?chkPeace（void）;
/*create?a?global?variable?named?stepFlg?use?to?note?the?step.*/
int?stepFlg?=?0;

int?enterChsman（int?row?int?col）
{
?/*out?of?size.*/
?if（row?>=?SIZE?||?col?>=?SIZE）
??return?0;
?/*the?pionted?location?is?not?empty.*/
?if（chsman[row][col]?!=?0）
??return?0;
?/*okay?put?down?the?chessman.*/
?chsman[row][col]?=?P1;
?return?1;
}
/*user?input.*/
void?input（void）
{
????int?row?col;
?do{
??printf（“Please?locate?your?chessman:\n“）;
??printf（“Location?row:?“）;
??scanf（“%d“?&row）;
??printf（“Location?column:?“）;
??scanf（“%d“?&col）;
????????if（enterChsman（row?-?1?col?-?1）?==?1）{
???printf（“You?located?chessman?at?[%d][%d].\n“?row?col）;
???dsply（）;
???break;
??}
??else
???printf（“Error?:?You?put?the?chess?to?a?wrong?location\n“）;
?}while（1）;
????return;
}
/*computer?judge?and?input.*/
void?judge（void）
{
?int?row?col;
?int?i;
?/*the?risk?level?status?of?the?chessboard.*/
?/*the?attack?level?status?of?the?chessboard.*/
?int?rskAndAtkLevlRow[SIZE]?=?{0}?rskAndAtkLevlCol[SIZE]?=?{0}?rskAndAtkLevlSlsh[2]?=?{0};
?/*obviate?the?special?satus?of?the?first?chessman?*/
?if（stepFlg?==?0）{
??/*now?flag?the?first?chessman?had?down.*/
??stepFlg?=?1;
??if（chsman[1][1]?==?P1）{
???chsman[0][0]?=?P2;
???printf（“The?computer?located?chessman?at?[0][0].\n“）;
???dsply（）;
???return;
??}
??else{
???chsman[1][1]?=?P2;
???printf（“The?computer?located?chessman?at?[1][1].\n“）;
???dsply（）;
???return;
??}
?}
?/*note?the?number?of?the?step.*/
?stepFlg++;
?/*evaluate?the?risk?level?and?attack?level?of?every?row?column?and?slash.*/
?for（row?=?0;?row??????for（col?=?0;?col??????????rskAndAtkLevlRow[row]?+=?chsman[row][col];
?????}
?}
?for（col?=?0;?col??????for（row?=?0;?row??????????rskAndAtkLevlCol[col]?+=?chsman[row][col];
?????}
?}
?rskAndAtkLevlSlsh[0]?=?chsman[0][0]?+?chsman[1][1]?+?chsman[2][2];
?rskAndAtkLevlSlsh[1]?=?chsman[0][2]?+?chsman[1][1]?+?chsman[2][0];
?/*attck!*/
?/*attck?a?row.*/
?for（i?=?0;?i???if（rskAndAtkLe