Question

嗨，我正在为我的java类编写以下程序，但我无法弄清楚为什么我的数组也无法工作，即使它们在不同的类中，也不能使int计数。方法。

 public static void main(String[] args) {

    //char{}{} Vote = {{President, Karl Karlington, Bob Mcbob, Nope Noper},{Vice President, Not Optiono, Hap Pinino, Rad ish},{Person, Not Person, Also Person, Person Person}}; 

    System.out.print("Welcome to voteathon 10,000!!\n");
    System.out.print("We will be displaying the canidates shortly\n");
    //display(Vote);
    PresVote(Nope, Bob, Karl);
    VPresVote(Not, Hap, Rad);
    PersonVote(NotP, AlsoP, Person);

    System.out.printf("For president Karl had: %d Bob had: %d Nope had: %d \n", Karl, Bob, Nope);
    System.out.printf("For vice president Not had: %d Hap had: %d Rad had: %d \n", Not, Hap, Rad);
    System.out.printf("For person Not had: %d Also had: %d Person had: %d \n", NotP, AlsoP, Person);

    }
public static void display(int x[][]){
    for(int row=0;row<4;row++){
        for(int column=0;column<x[row] .length;column++){
            System.out.print(x[row][column]+"\t");
        }
        System.out.println();
    }
}
public static void PresVote(int Nope, int Bob, int Karl){
    Scanner input = new Scanner(System.in);
    System.out.print("To vote please enter 1 2 or 3 corresponding to the table above\n");
    System.out.print("vote: ");
    int A = input.nextInt();

    if (A == 1){
        System.out.print("\nYou voted for Karl!\n");
        Karl++;

    }
    else if(A == 2){
        System.out.print("You voted for Bob!\n");
        Bob++;
       }
    else if (A == 3){
        System.out.print("You voted for Nope!\n");
        Nope++;
    }
    else{
        System.out.print("No vote invalid answer\n");
    }
}
    public static void VPresVote(int Not, int Hap, int Rad){
    Scanner input = new Scanner(System.in);
    System.out.print("To vote please enter 1 2 or 3 corresponding to the table above ");
    System.out.print("\n vote: \n");
    int A = input.nextInt();

    if (A == 1){
        System.out.print("You voted for Not!\n");
        Not++;

    }
    else if(A == 2){
        System.out.print("You voted for Hap!\n");
        Hap++;
       }
    else if (A == 3){
        System.out.print("You voted for Rad!\n");
        Rad++;
    }
    else{
        System.out.print("No vote invalid answer\n");
    }
}
    public static void PersonVote(int NotP, int AlsoP, int Person){
    Scanner input = new Scanner(System.in);
    System.out.print("To vote please enter 1 2 or 3 corresponding to the table above ");
    System.out.print("\n vote: \n");
    int A = input.nextInt();

    if (A == 1){
        System.out.print("You voted for Not!\n");
        NotP++;

    }
    else if(A == 2){
        System.out.print("You voted for Also!\n");
        AlsoP++;
       }
    else if (A == 3){
        System.out.print("You voted for Person!\n");
        Person++;
    }
    else{
        System.out.print("No vote invalid answer\n");
    }
}

我事先将init初始化了，但是我不知道这有什么作用

Answer 1

您没有返回传入的参数。在这种情况下，局部变量的参数没有全局作用域，因此在返回函数调用时，它们不保存执行信息（例如在这种情况下的增量）。

例如，传递这样的数组：

public static void main(String[] args) { 
    int[] president = new int[3]; //president[0] indicates 'x',president[2] say 'z' 
    Scanner input = new Scanner(System.in);
    System.out.print("To vote please enter 1 2 or 3 corresponding to the table above\n");
    System.out.print("vote: ");
    int A = input.nextInt();
    presVote(president, A);
    // rest of code
}
public static void presVote(int[] president, int A) {
    if(A == 1) {
        president[0]++; // vote count of 'x' increases by 1
    }
    // similar conditionals for other input
}

通过这种方式，总统席位将具有投票计数。

或其他方式是维护静态int变量以存储个人的投票计数。

使用其他方法协助表格数组和整数

1 个答案: