scanf_s 读取字符我在做什么错？

Question

{

    printf("Please give a random positive number for X: \n");
    scanf_s("%i", &X);
    char ch = getchar();
    char Gender;
    if (isdigit)
    {
        printf("Hay um... sorry what my i call you?");
        scanf_s("%i", Gender);

        printf("%lf \n" Gender ", if you may, please reread what i said, i asked you to give me a RANDOM NUMBER. \ncan you please explain to me why you gave me out of 1 through infinite numbers, a random letter? \n \n ");
    };

my problem is with ["%lf \n" Gender] saying that its expecting a [ ) ] can someone please explain what i am doing wrong?

Answer 1

A few issues here:

1. scanf_s takes a pointer to where you want to store the read value, so it should be scanf_s("%i", &Gender);
2. In C, you can't just insert a char into a string. I'm not sure exactly what you want from this, since %lf is a really weird format for printing a char , but that's what I'm assuming you want. In that case, you would want to move Gender to the end: printf("%lf \n...letter? \n \n", Gender); . This will insert Gender in the position of %lf .