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# How could I put input into an array from a single line of numbers?

Ranch Hand
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How could I put for example 1001 in int num1[] where each position would be a number from the input? for example:
num1[0] = 1
num1[1] = 0
num1[2] = 0
num1[3] = 1

Saloon Keeper
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I'm assuming you want to do this for an arbitrary non-negative integer, and not just 1001.

First, how would you get the least significant digit of an integer? If you had to get the digit 4 from the number 1234, how would you do it?

Rancher
Posts: 344
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Hi Hannah

If you want to find the least significant digit in value X in base N then just divide X by N and take the remainder. So if you have decimal value 1234 and want to extract the least signifcant digit, you just calculate 1234 % 10 = 4. Then you want to 'remove' the 4 so you can get the next digit, and to do that you just divide by 10 ie. 1234 / 10 = 123 (using integer division).

And repeat, until you run out of digits ie. X is 0.

Alternatively, just convert your number into a string and extract the digits from that. Use sprintf(buf, "%d", X) to get the decimal representation of X in buf, "1234", so buf[0] = '1', buf[1] = '2' etc. Then convert the character values to numbers by subtracting '0' ie. '2' - '0' = 2.

(To be safe you should use snprintf() - look it up.)

Cheers
John

Edit: sorry Stephan, didn't see your post until after posting mine.

Hanna Roberts
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Oh ok that makes sense, thank you for the help

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