Is it possible to have an nested conditional statement?

Question

Im trying do-while condition and there's another while inside of it, im having a problem in "do you want to continue?", its skipping it.. Is there anything wrong to my codes?

do {
    printf("\nEnter the start value:");
    scanf("%d", &start_value);
    printf("\nEnter the end value:");
    scanf("%d", &end value);
    printf("\nEnter the interval value:");
    scanf("%d", &interval_value);
    while (start_value <= end_value) {
        printf("%d ", start_value);
        start_value = start_value + interval_value;
    }
    printf("\nDo you want to continue?");
    scanf("%c", &answer);
} while (answer != 'N' || answer != 'n');

Huh? you are assigning values to the variables, "first" and "second", then never using them again. — OldProgrammer, Aug 19 '16 at 17:10
OK, the answer from Weather Vane also adds a very valid point, but the "skipping" part is in the dupe. Please let me know if anyone disagrees withe the CV. — Sourav Ghosh, Aug 19 '16 at 17:13
`start_value` and `end_value` should be `first` and `second` or vice versa. — chqrlie, Aug 19 '16 at 17:20
@SouravGhosh: this duplicate is of very poor quality. I'm sure there are better ones. — chqrlie, Aug 19 '16 at 17:28
@Holow: you should accept the answer by clicking on the grey checkmark below its score. — chqrlie, Aug 20 '16 at 17:22
@SouravGhosh can you explain what is the difference from this scanf("%c", &answer); to this scanf(" %c", &answer);? — Holow, Aug 21 '16 at 07:42

score 3 · Answer 1 · answered Aug 19 '16 at 17:09

3

Your conditional statement

while(answer != 'N' || answer != 'n');

is always true. I suggest

while(answer != 'N' && answer != 'n');

(in addition to the first comment above from @SouravGhosh, which cleans off the newline left in the input buffer)

answered Aug 19 '16 at 17:09

Weather Vane

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I would suggest also `if (scanf(" %c", &answer) != 1) break;` – chqrlie Aug 19 '16 at 17:15
My main problem is that, my "do you want to continue?" has been skipped, any suggestion what is my error? – Holow Aug 20 '16 at 01:53
@Holow the solution is in the first comment right at the top, which I mentioned in my answer. If that is unclear, [this answer](http://stackoverflow.com/questions/39043617/something-is-wrong-with-the-scanfs-and-or-ifs-in-my-program-coffee-shop/39043835#39043835) suggests it too. Also, please have a good read of the man page for the `scanf` function. – Weather Vane Aug 20 '16 at 16:58

Is it possible to have an nested conditional statement?

1 Answers1