How do i convert a binary int into a string? [duplicate]

Question

I'm looking to convert an integer representation of binary into a string. i'm not allowed to use bitwise operations. when i converted the decimal integer value into that integer binary representation, i could've put the digits in a string and reverse, but i'm searching for a more elegant way.

Any ideas?

actually, all the numbers are represented in binary at CPU level, means when you type int a = 5, the value of a is viewed as 101. unless you provide an example, this question is not clear. — ThunderWiring
– ThunderWiring, Commented Nov 19, 2016 at 8:10
You are confused. An integer is not binary (or octal, or decimal). It can be represented in binary (or octal), or in English (e.g. five is the same as 0b101 in binary, or 5 in decimal). — Basile Starynkevitch
– Basile Starynkevitch, Commented Nov 19, 2016 at 8:21

David Ranieri · Accepted Answer · 2016-11-19 08:19:47Z

3

If you can't use bitwise operators just divide by 2 and check the reminder, you don't need to reverse the string if you use a fixed size (i.e. 32), something like:

/* Only for positive numbers */

char bin[] = "00000000000000000000000000000000";
int count = 31, num = 25;

while (num) {
    if (num % 2) bin[count] = '1';
    num /= 2;
    count--;
}
printf("%s\n", bin);

answered Nov 19, 2016 at 8:19

David Ranieri

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