Question

我想知道如何在for循环的每一行之后获得输入。

System.out.println("How many days?");
int days = keyboard.nextInt();

int A = 0;
int B = 0;
int C = 0;

for(int i = 1; i < days; ++i(
{
  System.out.println("Enter an input for day " +i + "of A B C:");
}

打印出来

Enter an input for day 1 of A B C:
Enter an input for day 2 of A B C:

取决于天好的价值。但是我需要在每天之后为A B C输入一个值，而不是一次只打印它们。我该如何继续这样做？

Answer 1

使用Scanner keyboard

Scanner keyboard = new Scanner(System.in);

System.out.println("How many days?");
int days = keyboard.nextInt();

int A = 0;
int B = 0;
int C = 0;

for(int i = 1; i < days; ++i(
{
  System.out.println("Enter an input for day " +i + "of A:");
  A = keyboard.nextInt();
  System.out.println("Enter an input for day " +i + "of B:");
  B = keyboard.nextInt();
  System.out.println("Enter an input for day " +i + "of C:");
  C = keyboard.nextInt();
}

如果您想在一次通话中输入A，B和C，可以使用String abcInput = keyboard.nextLine();，然后继续String：

String abcInput = keyboard.nextLine();
String[] split = abcInput.split(" ");
if(split.length == 3){
    //3 Values found so assign it to A,B and C
    A = Integer.parseInt(split[0]);            
    B = Integer.parseInt(split[1]);            
    C = Integer.parseInt(split[2]);            
}else{
    System.out.println("Not enough input");
}

Answer 2

我猜你做到了：

Scanner keyboard = new Scanner(System.in);

上面代码中的某处。

System.out.println("How many days?");
    int days = keyboard.nextInt();


int A = 0;
int B = 0;
int C = 0;

for(int i = 1; i < days; ++i)
{
  System.out.println("Enter an input for day " +i + "of A:");
   int A = keyboard.nextInt();
}

将您的扫描仪代码移动到for循环内以进行输入。不确定A，B，C在上下文中是什么。但如果你需要所有n天的A，B和C，那么只需重复B和C的for循环中的两行。

使用for循环进行多个值输入

2 个答案: