这是井字游戏的评估功能。第14行出现错误：“ else”没有前面的“ if”，但是我找不到错误所在。我应该更改什么代码？
#include <stdio.h>
#include <stdlib.h>
enum ttt {X, O, UNMARKED};
enum ttt board[3][3];
enum evalboard{XWon, OWon, NoOneWon, NotOverYet};
void evaluation(void){
int i;
/*Check the rows*/
for(i = 0; i < 3; i = i + 1){
if( (board[i][0] == X) && (board[i][1] == X) && (board[i][2] == X) )
evalboard = XWon; break;
else if(board[i][0] == O && board[i][1] == O && board[i][0] == O )
evalboard = OWon; break;
else if(board[i][0] == UNMARKED || board[i][1] == UNMARKED || board[i][2] == UNMARKED )
evalboard = NotOverYet; break;
else if(board[i][0] != UNMARKED || board[i][1] != UNMARKED || board[i][2] != UNMARKED )
evalboard = NoOneWon; break;
}
/*Check the columns*/
for(i = 0; i < 3; i = i + 1){
if( board[0][i] == X && board[1][i] == X && board[0][i] == X )
evalboard XWon; break;
else if( board[0][i] == O && board[1][i] == O && board[0][i] == O) )
evalboard OWon; break;
else if(board[0][i] == UNMARKED || board[1][i] == UNMARKED || board[2][i] == UNMARKED )
evalboard = NotOverYet; break;
else if(board[i][0] != UNMARKED || board[i][1] != UNMARKED || board[i][2] != UNMARKED )
evalboard = NoOneWon; break;
}
/*Check the diagonals*/
else if( board[0][0] == X && board[1][1] == X && board[0][0] == X )
evalboard XWon;
else if( board[0][2] == O && board[1][1] == O && board[0][2] == O )
evalboard OWon;
}
最佳答案
您需要添加括号。
那是因为您的条件块中有1条以上的指令。它不像开关;）