Linux网络编程10——使用UDP实现五子棋对战
思路
1. 通信
为了同步双方的棋盘，每当一方在棋盘上落子之后，都需要发送给对方一个msg消息，让对方知道落子位置。msg结构体如下:
/* 用于发给对方的信息 */ typedef struct tag_msg { int msg_type; /* 悔棋? */ int msg_color; int msg_row; int msg_col; }MSG, *pMSG;
2. 悔棋
用链表头插法来模拟栈，链表记录了双方下子的轨迹。结构如下：
/* 记录每一步的轨迹 */ typedef struct tag_trace { int tr_cow; int tr_col; char tr_before[4]; /* 记录原来该位置的内容。注意要存下之前的！！ */ struct tag_trace* tr_next; }TRACE, *pTRACE;
使用两个链表，一个链表用于记录自己下棋的轨迹，便于自己悔棋；另一个链表用于记录对方下棋的轨迹，便于对方悔棋。
3. 判断胜负
以水平方向为例：需要判断该棋子（包括该子）左边有多少相同颜色的棋子相连，以及右边有多少相同颜色的棋子相连，两者相加如果和大于等于5，则判赢。其余3个方向类似。具体可以参加代码。
4. 本代码用到了Linux网络编程9——对TCP与UDP的简易封装2.0中的动态库文件。
代码
chess.h
#ifndef __MY_CHESS_H__ #define __MY_CHESS_H__ #include "my_socket.h" #include <pthread.h> #define MSG_NORMAL 1 #define MSG_BACK 2 #define CH_BLACK 1 #define CH_WHITE 2 #define ROW 19 #define COL 19 #define WHITE_CHESS "○" #define BLACK_CHESS "●" typedef struct tag_msg { int msg_type ; int msg_color ; int msg_row ; int msg_col ; }MSG, *pMSG ; typedef struct tag_trace { int tr_row ; int tr_col ; char tr_before[4] ; struct tag_trace* tr_next ; }TRACE, *pTRACE; void chess_show(char ch[][COL][4], int row); int chess_win(char arr[][COL][4], int row, int pos_x, int pos_y, char* color); #endif
chess.c
/************************************************************************* > File Name: chess.c > Author: KrisChou > Mail:[email protected] > Created Time: Wed 03 Sep 2014 09:35:57 PM CST ************************************************************************/ #include "chess.h" void chess_show(char arr[][COL][4], int row_cnt) { int row, col ; printf(" "); for(col = 0; col < COL ; col ++) { printf("%2d", col + 1); } printf("\n"); for(row = 0; row < row_cnt ; row ++) { printf("%3d ", row + 1); for(col = 0; col < COL ; col ++) { printf("%s", arr[row][col]); if(col != row_cnt -1 ) { printf("-"); } } printf("\n"); } printf("\n"); } int chess_win(char arr[][COL][4], int row, int pos_x, int pos_y, char* color) { // level int cnt1, cnt2 ; int index_x, index_y ; for(cnt1 = 0,index_x = pos_x, index_y = pos_y; index_y < COL; index_y ++) { if(strcmp(arr[index_x][index_y], color) == 0) { cnt1 ++ ; }else { break ; } } for(cnt2 = 0, index_x = pos_x , index_y = pos_y - 1 ; index_y >= 0; index_y --) { if(strcmp(arr[index_x][index_y], color) == 0) { cnt2 ++ ; }else { break ; } } if(cnt1 + cnt2 >= 5) { return 1 ; } // vertical for(cnt1 = 0,index_x = pos_x, index_y = pos_y; index_x >= 0; index_x --) { if(strcmp(arr[index_x][index_y], color) == 0) { cnt1 ++ ; }else { break ; } } for(cnt2 = 0, index_x = pos_x + 1 , index_y = pos_y ; index_x < row ; index_x ++) { if(strcmp(arr[index_x][index_y], color) == 0) { cnt2 ++ ; }else { break ; } } if(cnt1 + cnt2 >= 5) { return 1 ; } // + == int sum = pos_x + pos_y ; for(cnt1 = 0, index_x = pos_x; index_x >= 0 && sum - index_x < COL; index_x --) { if(strcmp(arr[index_x][sum - index_x], color) == 0) { cnt1 ++ ; }else { break ; } } for(cnt2 = 0, index_x = pos_x + 1; index_x < row && index_x <= sum ; index_x ++ ) { if(strcmp(arr[index_x][sum - index_x], color) == 0) { cnt2 ++ ; }else { break ; } } if(cnt1 + cnt2 >= 5) { return 1 ; } // abs - == int delt ; if(pos_x > pos_y) { delt = pos_x - pos_y ; for(cnt1 = 0 , index_x = pos_x; index_x >=0 && index_x >= delt; index_x --) { if(strcmp(arr[index_x][index_x - delt], color) == 0) { cnt1 ++ ; }else { break ; } } for(cnt2 = 0, index_x = pos_x + 1; index_x < row ; index_x ++) { if(strcmp(arr[index_x][index_x - delt], color) == 0) { cnt2 ++ ; }else { break ; } } }else// pos_y >= pos_x { delt = pos_y - pos_x ; for(cnt1 = 0 , index_x = pos_x; index_x >=0 ; index_x --) { if(strcmp(arr[index_x][index_x + delt], color) == 0) { cnt1 ++ ; }else { break ; } } for(cnt2 = 0, index_x = pos_x + 1; index_x < row && index_x + delt < COL ; index_x ++) { if(strcmp(arr[index_x][index_x + delt], color) == 0) { cnt2 ++ ; }else { break ; } } } if(cnt1 + cnt2 >= 5) { return 1 ; } return 0; }
main.c
/************************************************************************* > File Name: main.c > Author: KrisChou > Mail:[email protected] > Created Time: Wed 03 Sep 2014 10:04:07 PM CST ************************************************************************/ #include "chess.h" #define B_IP "127.0.0.1" #define B_PORT 8888 #define W_IP "127.0.0.1" #define W_PORT 6666 #define POS_TRANS(pos) (pos -1) #define IS_OK(row, col) ( row >= 0 && col >= 0 && col <= 18 &&row <= 18 &&strcmp(my_chess[row][col], WHITE_CHESS) != 0 && strcmp(my_chess[row][col], BLACK_CHESS) != 0) int main(int argc, char* argv[]) { char my_chess[ROW][COL][4] = { "┌","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┬","┐" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "├","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┼","┤" , "└","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┴","┘" }; int sfd ; pTRACE my_tr, peer_tr, pStep, pTmp ; my_tr = NULL ; peer_tr = NULL ; #ifdef FIRST my_socket(&sfd, MY_UDP, B_IP, B_PORT); #else my_socket(&sfd, MY_UDP, W_IP, W_PORT); #endif int row, col ; MSG my_msg ; #ifdef FIRST chess_show(my_chess, ROW); while(1)// 0, 0 { do { printf(">>"); scanf("%d%d", &row, &col); if(row == 0 || col == 0) { break ; } }while( !IS_OK(POS_TRANS(row), POS_TRANS(col))) ; if(row !=0 && col != 0)// normal { my_msg.msg_type = MSG_NORMAL ; my_msg.msg_color = CH_BLACK ; my_msg.msg_row = POS_TRANS(row) ; my_msg.msg_col = POS_TRANS(col) ; my_sendto(NULL, sfd, &my_msg, sizeof(MSG), W_IP, W_PORT); pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = POS_TRANS(row) ; pStep ->tr_col = POS_TRANS(col) ; strcpy(pStep ->tr_before, my_chess[POS_TRANS(row)][POS_TRANS(col)]) ; pStep -> tr_next = my_tr ; my_tr = pStep ; strcpy(my_chess[POS_TRANS(row)][POS_TRANS(col)], BLACK_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, POS_TRANS(row), POS_TRANS(col), BLACK_CHESS)) { printf("black win !"); exit(1); } }else { if(my_tr == NULL) { continue ; }else { memset(&my_msg, 0, sizeof(MSG)); my_msg.msg_type = MSG_BACK ; my_sendto(NULL, sfd, &my_msg, sizeof(MSG), W_IP, W_PORT); strcpy(my_chess[my_tr -> tr_row][my_tr -> tr_col], my_tr ->tr_before); system("clear"); chess_show(my_chess, ROW); pTmp = my_tr ; my_tr = my_tr -> tr_next ; free(pTmp); pTmp = NULL ; /* 本方悔棋后，需要在下一次 */ do{ printf(">>"); scanf("%d%d", &row, &col); }while( !IS_OK(POS_TRANS(row), POS_TRANS(col))) ; my_msg.msg_type = MSG_NORMAL ; my_msg.msg_color = CH_BLACK ; my_msg.msg_row = POS_TRANS(row) ; my_msg.msg_col = POS_TRANS(col) ; my_sendto(NULL, sfd, &my_msg, sizeof(MSG), W_IP, W_PORT); pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = POS_TRANS(row) ; pStep ->tr_col = POS_TRANS(col) ; strcpy(pStep ->tr_before, my_chess[POS_TRANS(row)][POS_TRANS(col)]) ; pStep -> tr_next = my_tr ; my_tr = pStep ; strcpy(my_chess[POS_TRANS(row)][POS_TRANS(col)], BLACK_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, POS_TRANS(row), POS_TRANS(col), BLACK_CHESS)) { printf("black win !"); exit(1); } } } memset(&my_msg, 0, sizeof(MSG)); my_recvfrom(NULL, sfd, &my_msg, sizeof(MSG), NULL, NULL); if(my_msg.msg_type == MSG_NORMAL) { pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = my_msg.msg_row ; pStep ->tr_col = my_msg.msg_col ; strcpy(pStep ->tr_before, my_chess[my_msg.msg_row][my_msg.msg_col]) ; pStep -> tr_next = peer_tr; peer_tr = pStep ; strcpy(my_chess[my_msg.msg_row][my_msg.msg_col], WHITE_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, my_msg.msg_row, my_msg.msg_col, WHITE_CHESS)) { printf("white win !"); exit(1); } }else if(my_msg.msg_type == MSG_BACK) { strcpy(my_chess[peer_tr -> tr_row][peer_tr -> tr_col], peer_tr ->tr_before); system("clear"); chess_show(my_chess, ROW); pTmp = peer_tr ; peer_tr = peer_tr -> tr_next ; free(pTmp); pTmp = NULL ; /* 对方悔棋后，本方需要再收一次 */ memset(&my_msg, 0, sizeof(MSG)); my_recvfrom(NULL, sfd, &my_msg, sizeof(MSG), NULL, NULL); pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = my_msg.msg_row ; pStep ->tr_col = my_msg.msg_col ; strcpy(pStep ->tr_before, my_chess[my_msg.msg_row][my_msg.msg_col]) ; pStep -> tr_next = peer_tr; peer_tr = pStep ; strcpy(my_chess[my_msg.msg_row][my_msg.msg_col], WHITE_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, my_msg.msg_row, my_msg.msg_col, WHITE_CHESS)) { printf("white win !"); exit(1); } } } #else { chess_show(my_chess, ROW); while(1) { memset(&my_msg, 0, sizeof(MSG)); my_recvfrom(NULL, sfd, &my_msg, sizeof(MSG), NULL, NULL); if(my_msg.msg_type == MSG_NORMAL) { pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = my_msg.msg_row ; pStep ->tr_col = my_msg.msg_col ; strcpy(pStep ->tr_before, my_chess[my_msg.msg_row][my_msg.msg_col]) ; pStep -> tr_next = peer_tr; peer_tr = pStep ; strcpy(my_chess[my_msg.msg_row][my_msg.msg_col], BLACK_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, my_msg.msg_row, my_msg.msg_col, BLACK_CHESS)) { printf("black win !"); exit(1); } }else if(my_msg.msg_type == MSG_BACK) { strcpy(my_chess[peer_tr -> tr_row][peer_tr -> tr_col], peer_tr ->tr_before); system("clear"); chess_show(my_chess, ROW); pTmp = peer_tr ; peer_tr = peer_tr -> tr_next ; free(pTmp); pTmp = NULL ; memset(&my_msg, 0, sizeof(MSG)); my_recvfrom(NULL, sfd, &my_msg, sizeof(MSG), NULL, NULL); pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = my_msg.msg_row ; pStep ->tr_col = my_msg.msg_col ; strcpy(pStep ->tr_before, my_chess[my_msg.msg_row][my_msg.msg_col]) ; pStep -> tr_next = peer_tr; peer_tr = pStep ; strcpy(my_chess[my_msg.msg_row][my_msg.msg_col], BLACK_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, my_msg.msg_row, my_msg.msg_col, BLACK_CHESS)) { printf("black win !"); exit(1); } } do{ printf(">>"); scanf("%d%d", &row, &col); if(row == 0 || col == 0) { break ; } }while(!IS_OK(POS_TRANS(row), POS_TRANS(col))) ; if(row != 0 && col != 0 )//normal { my_msg.msg_type = MSG_NORMAL ; my_msg.msg_color = CH_WHITE ; my_msg.msg_row = POS_TRANS(row) ; my_msg.msg_col = POS_TRANS(col) ; my_sendto(NULL, sfd, &my_msg, sizeof(MSG), B_IP, B_PORT); pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = POS_TRANS(row) ; pStep ->tr_col = POS_TRANS(col) ; strcpy(pStep ->tr_before, my_chess[POS_TRANS(row)][POS_TRANS(col)]) ; pStep -> tr_next = my_tr ; my_tr = pStep ; strcpy(my_chess[POS_TRANS(row)][POS_TRANS(col)], WHITE_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, POS_TRANS(row), POS_TRANS(col), WHITE_CHESS)) { printf("white win !"); exit(1); } }else { if(my_tr == NULL) { continue ; }else { memset(&my_msg, 0, sizeof(MSG)); my_msg.msg_type = MSG_BACK ; my_sendto(NULL, sfd, &my_msg, sizeof(MSG), B_IP, B_PORT); strcpy(my_chess[my_tr -> tr_row][my_tr -> tr_col], my_tr ->tr_before); system("clear"); chess_show(my_chess, ROW); pTmp = my_tr ; my_tr = my_tr -> tr_next ; free(pTmp); pTmp = NULL ; do{ printf(">>"); scanf("%d%d", &row, &col); }while(!IS_OK(POS_TRANS(row), POS_TRANS(col)) ); my_msg.msg_type = MSG_NORMAL ; my_msg.msg_color = CH_WHITE ; my_msg.msg_row = POS_TRANS(row) ; my_msg.msg_col = POS_TRANS(col) ; my_sendto(NULL, sfd, &my_msg, sizeof(MSG), B_IP, B_PORT); pStep = (pTRACE)calloc(1, sizeof(TRACE)) ; pStep ->tr_row = POS_TRANS(row) ; pStep ->tr_col = POS_TRANS(col) ; strcpy(pStep ->tr_before, my_chess[POS_TRANS(row)][POS_TRANS(col)]) ; pStep -> tr_next = my_tr ; my_tr = pStep ; strcpy(my_chess[POS_TRANS(row)][POS_TRANS(col)], WHITE_CHESS); system("clear"); chess_show(my_chess, ROW); if(chess_win(my_chess, ROW, POS_TRANS(row), POS_TRANS(col), WHITE_CHESS)) { printf("white win !"); exit(1); } } } } } #endif return 0 ; }
编译如下：
gcc -o black *.c -DFIRST -lmy_socket -I/home/purple/include
gcc -o white *.c -lmy_socket -I/home/purple/include