// C program to implement itoa()
#include <stdbool.h>
#include <stdio.h>
// A utility function to reverse a string
void reverse(char str[], int length)
{
int start = 0;
int end = length - 1;
while (start < end) {
char temp = str[start];
str[start] = str[end];
str[end] = temp;
end--;
start++;
}
}
// Implementation of citoa()
char* citoa(int num, char* str, int base)
{
int i = 0;
bool isNegative = false;
/* Handle 0 explicitly, otherwise empty string is
* printed for 0 */
if (num == 0) {
str[i++] = '0';
str[i] = '\0';
return str;
}
// In standard itoa(), negative numbers are handled
// only with base 10. Otherwise numbers are
// considered unsigned.
if (num < 0 && base == 10) {
isNegative = true;
num = -num;
}
// Process individual digits
while (num != 0) {
int rem = num % base;
str[i++] = (rem > 9) ? (rem - 10) + 'a' : rem + '0';
num = num / base;
}
// If number is negative, append '-'
if (isNegative)
str[i++] = '-';
str[i] = '\0'; // Append string terminator
// Reverse the string
reverse(str, i);
return str;
}
// Driver program to test implementation of itoa()
int main()
{
char str[100];
printf("Number: %d\nBase: %d\tConverted String: %s\n",
1567, 10, citoa(1567, str, 10));
printf("Base: %d\t\tConverted String: %s\n", 2,
citoa(1567, str, 2));
printf("Base: %d\t\tConverted String: %s\n", 8,
citoa(1567, str, 8));
printf("Base: %d\tConverted String: %s\n", 16,
citoa(1567, str, 16));
return 0;
}#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
int a=54325;
char buffer[20];
itoa(a,buffer,2); // here 2 means binary
printf("Binary value = %s\n", buffer);
itoa(a,buffer,10); // here 10 means decimal
printf("Decimal value = %s\n", buffer);
itoa(a,buffer,16); // here 16 means Hexadecimal
printf("Hexadecimal value = %s\n", buffer);
return 0;
}