Question

for these guidelines:

Write a loop that reads positive integers from standard input and that terminates when it reads an integer that is not positive. After the loop terminates, it prints out, separated by a space and on a single line, the sum of all the even integers read and the sum of all the odd integers read. Declare any variables that are needed.

ASSUME the availability of a variable, stdin , that references a Scanner object associated with standard input.

I wrote this code, but it the HW software will not except it due to a logical error. I cant seem to find the logical error here. can someone point out what is wrong with it?

    int sumP=0;
    int sumO=0;
    Scanner stdin = new Scanner (System.in);

    System.out.println("enter an odd or even number");

    while (stdin.nextInt() >= 0){
    if(stdin.nextInt()%2 == 0)
        sumP+= stdin.nextInt();
    else
        sumO += stdin.nextInt();
    }
    System.out.println(sumP + " " + sumO);

Answer 1

You need to save the value you have read, otherwise you will be used different values in the while loop and the addition.

int n;
while((n = stdin.readInt()) >= 0) {
    // use the same value of n