c - 我想仅使用一个 for 循环同时打印算术级数和几何级数，但我只能打印一个

Question

int main()
{
    char choice;
    do
    {
        int num, ratio,iter,firstno = 0;
        printf("enter the no of times\n");
        scanf("%d",&num);
        printf("enter the first num\n");
        scanf("%d",&firstno);
        printf("enter the ratio\n");
        scanf("%d",&ratio);
        int ap = 0, gp = 1;

        for (iter = 1; iter <= num; iter++)
        {
            switch (iter)
            {
            case 1:
                printf("AP : %d ",firstno);
                break;
            default:
                ap = firstno + ratio;
                printf("%d ", ap);
                firstno = ap;
                break;
            }

        }
        printf("\n");

        printf("do you want to continue(y/n):\n");
        scanf(" %c", &choice);
    } while(choice == 'y'); 
    return 0;
}

如何仅使用一个 for 循环打印两个序列？我在 for 循环中使用了 switch case，但只能打印算术级数。谁能帮我吗？ 输入:= 5 从2开始 共同差异3 (以上所有可能会有所不同，其用户选择预期输出:美联社:2 5 8 11 14普通话:2 6 18 54 162

Answer 1

您可以创建一个表格来使用单个循环显示 AP 和 GP

这是代码:

int main()
{
    char choice;
    do {
        int num, ratio,iter,firstno = 0;
        printf("enter the no of times\n");
        scanf("%d",&num);
        printf("enter the first num\n");
        scanf("%d",&firstno);
        printf("enter the ratio\n");
        scanf("%d",&ratio);
        int ap = firstno, gp = firstno;

        printf("--------------------\n");
        printf("|  n |   ap |   gp |\n");
        printf("--------------------\n");


        for (iter = 1; iter <= num; iter++) {
            printf("|%3d |%5d |%5d |\n", iter, ap, gp);
            ap = ap + ratio;
            gp = gp * ratio;
        }

        printf("--------------------\n");

        printf("\n");

        printf("do you want to continue(y/n):\n");
        scanf(" %c", &choice);
    } while(choice == 'y'); 
    return 0;
}

输出:

--------------------
|  n |   ap |   gp |
--------------------
|  1 |    1 |    1 |
|  2 |    3 |    2 |
|  3 |    5 |    4 |
|  4 |    7 |    8 |
|  5 |    9 |   16 |
|  6 |   11 |   32 |
--------------------