java 错误：二元运算符“&&”的错误操作数类型
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error: bad operand types for binary operator '&&'
提问by JT attack
Not sure what is wrong here is the line that wrong.
不确定这里有什么问题是错误的行。
if((board[z][i] = 1) && (board[z][i++] = 1) && (board[z++][i] = 1)){
Here is my whole code not finished:
这是我未完成的整个代码：
public class Solution {
static void nextMove(int player, int [][] board){
}
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int player;
int board[][] = new int[8][8];
//If player is 1, I'm the first player.
//If player is 2, I'm the second player.
player = in.nextInt();
//Read the board now. The board is a 8x8 array filled with 1 or 0.
for(int z = 0; z < 8; z++){
for(int i = 0; i < 8; i++) {
board[(z)][(i)] = in.nextInt();
}
}for(int z = 0; z < 8; z++){
for(int i = 0; i < 8; i++) {
if((board[z][i] = 1) && (board[z][i++] = 1) && (board[z++][i] = 1)){
System.out.print(z + " " + i);
}
}
}
nextMove(player,board);
}
}
回答by java is life
You need to use the relational operator == instead of =. Each of the 3 sub-statements within the parentheses of your if statement should represent a boolean. In Java, = is used to assign a value and == is used to check equality. Therefore, you must change your if statement to:
您需要使用关系运算符 == 而不是 =。if 语句括号内的 3 个子语句中的每一个都应表示一个布尔值。在 Java 中，= 用于赋值，而 == 用于检查相等性。因此，您必须将 if 语句更改为：
if((board[z][i] == 1) && (board[z][i++] == 1) && (board[z++][i] == 1)){
Also, rather than incrementing z and i by 1 (because you are already doing that as part of your for loop), maybe make i++ --> i + 1 and z++ --> z + 1.
此外，与其将 z 和 i 递增 1（因为您已经将其作为 for 循环的一部分），还不如使 i++ --> i + 1 和 z++ --> z + 1。
Hope this helps!
希望这可以帮助！
回答by KDP
if((board[z][i] ==1) && (board[z][i++] == 1) && (board[z++][i] == 1)){
use double equals for comparing. I think you have missed it :-)
使用双等号进行比较。我想你已经错过了:-)
回答by Michael
You're using the assignment operator, when you should be comparing them.
当您应该比较它们时，您正在使用赋值运算符。
if((board[z][i] == 1) && (board[z][i++] == 1) && (board[z++][i] == 1)){
回答by Sneh
if((board[z][i] = 1) && (board[z][i++] = 1) && (board[z++][i] = 1)) //Yes this line is wrong
You are using '='at (board[z][i] = 1)(board[z][i++] = 1)(board[z++][i] = 1)at these comparisons. You need to use '=='operand for comparison.
您正在使用“=”，在(board[z][i] = 1)(board[z][i++] = 1)(board[z++][i] = 1)这些比较。您需要使用'=='操作数进行比较。
An '='operator is used for assigning the values to the variables whereas '=='is used for comparison. Just to add one more point, when comparing values of two Stringsyou have to use .equals()method as '=='compares by reference in Java on objects.
一个“=”运算符用于分配值给变量而“==”被用于比较。再补充一点，当比较两个字符串的值时，您必须使用.equals()方法，因为'=='在 Java 中按引用比较对象。
回答by Héctor E
Shouldn't your code be
你的代码不应该是
if((board[z][i] == 1) && (board[z][i++] == 1) && (board[z++][i] == 1)){
if((board[z][i] == 1) && (board[z][i++] == 1) && (board[z++][i] == 1)){
emphasizing the ==issue
强调==问题
回答by Sourav Kanta
You used the assignment (=) operator instead of checking if they were equal. The equality is checked with == operator. Try this instead
您使用了赋值 (=) 运算符而不是检查它们是否相等。使用 == 运算符检查相等性。试试这个
if((board[z][i] ==1) && (board[z][i++] == 1) && (board[z++][i] == 1)){
