c programming itoa() example

Oren Gruber answered on May 23, 2022 Popularity 9/10 Helpfulness 8/10

answer c programming itoa() example

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c programming itoa() example

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#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;
}

Popularity 9/10 Helpfulness 8/10 Language c

Source: fresh2refresh.com

Tags: c

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Contributed on May 23 2022

Oren Gruber

0 Answers Avg Quality 2/10

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// 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;
}

Popularity 8/10 Helpfulness 1/10 Language whatever

Source: www.geeksforgeeks.org

Tags: whatever itoa c w

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Contributed on Jan 10 2024

ax3lt

0 Answers Avg Quality 2/10

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