多个项目的 Java 循环

Question

我正在java中工作，我希望只要有用户指定的项目，我的循环就可以运行。截至目前，代码运行了一次迭代，并读取了一次循环的结果，但不会再继续下去。

如果用户说有 3 个项目，我希望代码运行循环 3 次并告诉我每个项目的总数。现在，无论我指定项目数量是 1 还是 5，它都会告诉我 1 个项目的总数。

    double projectBoardFootage = 1.0;
    double projectBoardFootageTotal = 0.0;
    int i = 0;

    System.out.println("How many projects do you want to estimate?");
    int numberOfProjects = scan.nextInt();


    for(i = 0; i < numberOfProjects; ++i) {
        while (projectBoardFootage > 0) {
            System.out.println("Enter your board footage for Project #" + (i + 1) + " (0 to exit)");
            projectBoardFootage = scan.nextDouble();
            projectBoardFootageTotal += projectBoardFootage;
        }
        System.out.println("The raw board footage for Project #" + (i + 1) + " is: " + projectBoardFootageTotal);
    }

Answer 1

也许您想重新初始化总板素材以清除之前的迭代计数？

for(i = 0; i < numberOfProjects; ++i) {
    projectBoardFootageTotal = 0.0;
    while (projectBoardFootage > 0) {
        System.out.println("Enter your board footage for Project #" + (i + 1) + " (0 to exit)");
        projectBoardFootage = scan.nextDouble();
        projectBoardFootageTotal += projectBoardFootage;
    }
    System.out.println("The raw board footage for Project #" + (i + 1) + " is: " + projectBoardFootageTotal);
}