Question

我的问题是这样的，有N个人。考虑到N = 9，我必须找到那些人的应税收入。我已经为1名员工完成了数学运算，但是，将其应用于其他8个人则是重复代码太多。我可以将IF语句放入FOR循环中吗？我已经尝试过了，但是它在FOR循环中显示了一个错误（即变量N已经在main（String []）方法中定义了

public class IncomeTax {

    /**
     * @param args the command line arguments
     */

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int i,Tax = 0,N = 1;
        System.out.print("Enter the Taxable Income of the Employee " +N+":");
        i = input.nextInt();
        for( int N=1  ;N<=9 ; N++ ){
        if( i >= 0 & i<18200)
            Tax = 0;
        if( i >= 18201 & i<37000)
            Tax = (int) (( i - 18200) * 0.19);
        if( i >= 37001 & i<87000)
            Tax = (int) ((( i - 37000) * 0.325)+3572);
        if( i >= 87001 & i<180000)
            Tax = (int) ((( i - 18200) * 0.37)+19822);
        if( i >= 180001 )
            Tax = (int) ((( i - 18200) * 0.45)+54097);
        System.out.println("The Income Tax for the employee "+N+" is " + Tax);
        }    
    }
}

输出应为N = 9，分别是雇员人数和他们的税收。输入员工的应税收入：员工所得税1：输入员工的应税收入：2：员工2的所得税：输入员工的应税收入：3：员工3的所得税：

Answer 1

您应该将input.nextInt()代码粘贴到for循环中。并从int i,Tax = 0,N = 1;声明中删除N变量。因为您已经在for循环中声明了它。

解决方案：

public class IncomeTax {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int i,Tax = 0;
        for( int N=1; N<=9; N++ ){
        System.out.print("Enter the Taxable Income of the Employee " +N+":");
        i = input.nextInt();
        if( i >= 0 & i<18200)
            Tax = 0;
        if( i >= 18201 & i<37000)
            Tax = (int) (( i - 18200) * 0.19);
        if( i >= 37001 & i<87000)
            Tax = (int) ((( i - 37000) * 0.325)+3572);
        if( i >= 87001 & i<180000)
            Tax = (int) ((( i - 18200) * 0.37)+19822);
        if( i >= 180001 )
            Tax = (int) ((( i - 18200) * 0.45)+54097);
        System.out.println("The Income Tax for the employee "+N+" is " + Tax);
        }    
    }
}

Answer 2

您绝对可以在for循环中使用if语句-由于在for循环中重新声明了变量N，因此会出现错误。我建议要么使用其他变量字母，要么根本不在扫描仪下方声明它。

/**
 * @param args the command line arguments
 */

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    int i,Tax = 0;
    System.out.print("Enter the Taxable Income of the Employee " +N+":");
    i = input.nextInt();
    for( int N=1  ;N<=9 ; N++ ){
    if( i >= 0 & i<18200)
        Tax = 0;
    if( i >= 18201 & i<37000)
        Tax = (int) (( i - 18200) * 0.19);
    if( i >= 37001 & i<87000)
        Tax = (int) ((( i - 37000) * 0.325)+3572);
    if( i >= 87001 & i<180000)
        Tax = (int) ((( i - 18200) * 0.37)+19822);
    if( i >= 180001 )
        Tax = (int) ((( i - 18200) * 0.45)+54097);
    System.out.println("The Income Tax for the employee "+N+" is " + Tax);
    }    
}

在For循环中插入IF语句

2 个答案: