int-to-string.c

#include <stdio.h>
#include <stdlib.h>

int main() {
    int number = 30;

    int cur_char = 0;
    int size = sizeof(char);
    char* string = (char*)malloc(size);

    do {
        if (cur_char >= size) {
            size += sizeof(char);
            string = (char*)realloc(string, size);
        }

        string[cur_char] = '0' + (char) number % 10;
        number /= 10;
        cur_char++;
    } while (number > 0);

    printf("%s\n", string);
}