This post contains a total of 25+ Hand-Picked C Decimal to Hexadecimal Converter Examples. All the Decimal to Hexadecimal converters are made using C Programming language.
You can use the source codes of these programs for your own personal or educational use with credits to the original owner.
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1. By Amin RJ
Made by Amin RJ. A simple C Program to convert decimal number to hexadecimal. It also displays octal output. ( Source )
#include <stdio.h>
int main() {
int dec;
scanf("%d",&dec);
printf("Octal number:%o\n",dec);
printf("Hexadecimal number:%x\n",dec);
return 0;
}2. By Manthan Gohel
Made by Manthan Gohel. ( Source )
#include <stdio.h>
/* Please enter a "Decimal" number*/
int main() {
int a;
scanf("%d", &a);
printf("Hexa-decinal: %x", a);
printf("\n\nWelcome to my first C code!\n I know this is a very simple code\nbut if you enjoyed it then GIVE AN UPVOTE!!! ~Thank you");
return 0;
}3. By Alexandre Correia
Made by Alexandre Correia. ( Source )
//dec to hex num
#include <stdio.h>
int id1;
int main()
{
printf ("Insert Decimal Number: \n");
scanf ("%d", &id1);
printf ("Hexadecimal conversion: %x", id1);
return 0;
}4. By Karthik Paladugula
Made by Karthik Paladugula. Give the decimal number as input and the output is corresponding hexadecimal number. ( Source )
#include <stdio.h>
#include<string.h>
int main() {
int n,i,r;
char a[20];
printf ("Enter the decimal number\n");
scanf("%d",&n);
printf("The hexadecimal number for %d is \n",n);
for(i=0,r=0;n>0;n=n/16,++i)
{
r=n%16;
if(r==0)
a[i]='0';
else if(r==1)
a[i]='1';
else if(r==2)
a[i]='2';
else if(r==3)
a[i]='3';
else if(r==4)
a[i]='4';
else if(r==5)
a[i]='5';
else if(r==6)
a[i]='6';
else if(r==7)
a[i]='7';
else if(r==8)
a[i]='8';
else if(r==9)
a[i]='9';
else if(r==10)
a[i]='a';
else if(r==11)
a[i]='b';
else if(r==12)
a[i]='c';
else if(r==13)
a[i]='d';
else if(r==14)
a[i]='e';
else if(r==15)
a[i]='f';
}
strrev(a);
puts(a);
return 0;
}5. By Anket Pratap Singh
Made by Anket Pratap Singh. The program displays the hexadecimal value of a decimal number along with its octal value. ( Source )
#include <stdio.h>
int main()
{
int value;
scanf("%d",&value);//inter the value
printf("Decimal value is: %d\n",value);
printf("Octal value is: %o\n",value);
printf("Hexadecimal value is (Alphabet in small letters): %x\n",value);
printf("Hexadecimal value is (Alphabet in capital letters): %X\n",value);
return 0;
}
6. By DHARAM SINGH
Made by DHARAM SINGH. ( Source )
#include <stdio.h>
int main() {
char array[100];
int n,r,i=1;
int count=0;
scanf("%d",&n);
while(n>0)
{
r=n%16;
if(r<=9)
{
array[i]=r+48;
}
else
{
array[i]=r+55;
}
n=n/16;
i++;
count++;
}
for(i=count;i>0;i--)
{
printf("%c",array[i]);
}
return 0;
}7. By meherDev
Made by meherDev. ( Source )
#include<stdio.h>
int main()
{
int deci;
printf("Enter any +ve decimal number\n");
scanf("%d", &deci);
printf("Decimal = %d\nHexadecimal = %x", deci, deci);
}8. By sukumar chinthalapudi
Made by sukumar chinthalapudi. ( Source )
#include <stdio.h>
void convert(int,int);
int main()
{
int num;
printf ("enter a positive decimal number:");
scanf("%d",&num);
printf ("\nbinary number::");
convert (num,2);
//printf ("\n");
printf ("\noctal number::");
convert (num,8);
// printf ("\n");
printf ("\nhexadecimal::");
convert(num,16);
// printf ("\n");
return 0;
}
void convert (int num,int base)
{
int rem=num%base;
if(num==0)
return ;
convert (num/base,base);
if(rem<10)
printf ("%d",rem);
else
printf ("%c",rem-10+'A');
}9. By Mubarak Husain
Made by Mubarak Husain. ( Source )
#include <stdio.h>
#include<string.h>
void decimal_to_hexa(int num)
{
long quotient, remainder;
char z;
long int i, j = 0;
char hexadecimalnum[10];
quotient = num;
while (quotient != 0)
{
remainder = quotient % 16;
if (remainder < 10)
hexadecimalnum[j++] = 48 + remainder;
else
hexadecimalnum[j++] = 55 + remainder;
quotient = quotient / 16;
}
printf("The Hexadecimal equivalent of %d is ",num);
for (i = j; i >= 0; i--){
printf("%c", hexadecimalnum[i]);
}
return;
}
int main() {
int num;
//printf("Enter the Decimal number to be converted to Hexadecimal.");
scanf("%d",&num);
decimal_to_hexa(num);
}10. By srinivas srinu.
Made by srinivas srinu. ( Source )
#include <stdio.h>
int main()
{
int n;
printf ("enter a number digits should be range 0-9");
scanf ("%d ",&n);
printf("Decimal value is: %d\n",n);
printf("\nOctal value is: %o\n",n);
printf("\nHexadecimal value is (Alphabet in small letters): %x\n",n);
printf("\nHexadecimal value is (Alphabet in capital letters): %X\n",n);
return 0;
}11. By Nova
Made by Nova. Program To Convert Decimal To Hexadecimal Number Input : Enter Any Positive Integer. ( Source )
#include<stdio.h>
void main()
{
int a[15], num, i=0, j, temp;
printf("\tDecimal To Hexadecimal Conversion\n");
printf("\nEnter Any Decimal Number : ");
scanf("%d",&num);
printf("%d\n",num);
temp=num;
while(temp!=0)
{
a[i]=temp%16;
temp/=16;
i++;
}
printf("\nHexadecimal Form : ");
for(j=i-1;j>=0;j--)
{
switch(a[j])
{
case 10:
printf("A");
break;
case 11:
printf("B");
break;
case 12:
printf("C");
break;
case 13:
printf("D");
break;
case 14:
printf("E");
break;
case 15:
printf("F");
break;
default:
printf("%d",a[j]);
}
}
}
12. By Oppong Richard
Made by Oppong Richard. ( Source )
#include <stdio.h>
#include <stdlib.h>
//simple decimal to hexdecimal converter
//developed by OPPONG RICHARD
int main() {
int input;
puts("THIS IS A SIMPLE DECIMAL TO HEXDECIMAL CONVERTER");
puts("ENTER DECIMAL VALUE FOR CONVERSION");
scanf("%d",&input);
printf("\nDECIMAL VALUE : %d\n",input);
printf("\nHEXDECIMAL VALUE : %#X",input);
return 0;
}13. By Peterson Co
Made by Peterson Co. ( Source )
#include<stdio.h>
#include <string.h>
int main() {
int i,length,num, rem, number=0;
char string[1000]={'A','B','C','D','E','F'};
scanf ("%d", &num);
char string1[num];
for (i=num;i>0; i=i/16)
{
rem=i%16;
if (rem>9){
switch(rem)
{
case 10:string1[number]=string[0];
break;
case 11:string1[number]=string[1];
break;
case 12:string1[number]=string[2];
break;
case 13:string1[number]=string[3];
break;
case 14:string1[number]=string[4];
break;
case 15:string1[number]=string[5];
break;
}
}
else{
string1[number]=rem+'0';
}
number++;
}
length=strlen(string1);
length--;
for (i=length;i>=0;i--)
{
printf("%c", string1[i]);
}
return 0;
}14. By Malek Alsset
Made by Malek Alsset. Basic C program to convert decimal to hexadecimal. ( Source )
#include<stdio.h>
void convert(int, int);
int main()
{
int num;
printf("Enter a decimal number : ");
scanf("%d", &num);
printf("\nBinary number: ");
convert(num, 2);
printf("\n");
printf("\n");
printf("\nHexadecimal number: ");
convert(num, 16);
printf("\n");
return 0;
}
void convert (int num, int base)
{
int rem = num%base;
if(num==0)
return;
convert(num/base, base);
if(rem < 10)
printf("%d", rem);
else
printf("%c", rem-10+'A' );
}15. By Soham Saha
Made by Soham Saha. It displays the hexadecimal and the octal value of a decimal. ( Source )
//Decimal to Octal , Hexadecimal
#include <stdio.h>
int main() {
int Decimal;
scanf("%d",&Decimal);
printf("Decimal : %d \n",Decimal);
//for octal :
printf("Octal : ");
printf("%o",Decimal);//printing the octal number
printf("\n");
//for hexadecimal :
printf("Hexadecimal : ");
printf("%x",Decimal);//printing the hexadecimal number
printf("\n");
return 0;
}16. By Parmar Nilesh
Made by Parmar Nilesh. ( Source )
#include <stdio.h>
main()
{
int x;
printf("Give the decimal number\n");
scanf("%d",&x);
printf("decimal number = %d\n",x);
printf("Hexadecimal number = %x\n",x);
printf("octal number = %o\n",x);
}17. By Malek Alsset
Made by Malek Alsset. ( Source )
#include <stdio.h>
int main(void)
{
long int decn,q,dn=0,m,l;
int tmp;
char s;
printf("Input a Decimal number: ");
scanf("%ld",&decn);
q = decn;
for(l=q;l>0;l=l/16)
{
tmp = l % 16;
if( tmp < 10)
tmp =tmp + 48; else
tmp = tmp + 55;
dn=dn*100+tmp;
}
printf("\nThe hexadecimal value is : ");
for(m=dn;m>0;m=m/100)
{
s=m % 100;
printf("%c",s);
}
printf("\n\n");
}
18. By Binal Bharvad
Made by Binal Bharvad. ( Source )
#include<stdio.h>
int main()
{
int decnum, a, i=0;
char hexnum[50];
printf("Enter any decimal number: ");
scanf("%d", &decnum);
while(decnum!=0)
{
a = decnum%16;
if(a<10)
a = a +48;
else
a = a +55;
hexnum[i] = a;
i++;
decnum = decnum/16;
}
printf("\nEquivalent Value in Hexadecimal = ");
for(i=i-1; i>=0; i--)
printf("%c", hexnum[i]);
return 0;
}19. By Er. Suraj Sahu
Made by Er. Suraj Sahu. ( Source )
//Number system...
//Decimal to Hexadecimal converter
#include <stdio.h>
int main() {
int n;
scanf("%d",&n);
printf("%x",n);
return 0;
}20. By Anmol Pandey
Made by Anmol Pandey. ( Source )
#include<stdio.h>
int main()
{
int s[50],i=0,n,j;
printf("enter the number ");
scanf("%d",&n);
while(n>16){
s[i]=n%16;
if(s[i]>9){
s[i]=64+s[i]-9;
}
n=n/16;
i++;
}
s[i]=n%16;
if(s[i]>9){
s[i]=64+s[i]-9;
}
printf("hexadecimal number is ");
for(j=i;j>=0;j--){
if(s[j]<64)
printf("%d",s[j]);
else
printf("%c",s[j]);
}
}
21. By AMAN SRIVASTAVA
Made by AMAN SRIVASTAVA. ( Source )
#include<stdio.h>
void binary (int a)
{ int i=0,rem,c[20],j;
while(a>0)
{
rem=a%2;
c[i]=rem;
i++;
a=a/2;}
printf("decimal=");
for(j=i-1;j>=0;j--)
{
printf("%d",c[j]);
}printf("\n");
}
void octal (int b)
{
int i=0,rem,j,a[20];
while(b>0)
{
rem=b%8;
a[i]=rem;
b/=8;
i++;
}
for(j=i-1;j>=0;j--)
{
printf("%d",a[j]);
}printf("\n");
}
void hexa (int c)
{
int rem,d[20],i=0,j;
while(c>0)
{
rem=c%16;
d[i]=rem;
i++;
c/=16;
}
for(j=i-1;j>=0;j--)
{ if(d[j]>9)
switch(d[j])
{
case 10:
printf("A");
case 11:
printf("B");
case 12:
printf("C");
case 13:
printf("D");
case 14:
printf("E");
case 15:
printf("F");
}else
printf("%d",d[j]);
}printf("\n");
}
main()
{
int n;
printf("enter the number to be converted");
scanf("%d",&n);
binary(n);
octal(n);
hexa(n);
}22. By Sml Fox
Made by Sml Fox. ( Source )
#include <stdio.h>
int main() {
long decimalnum, quotient, remainder;
int i, j = 0;
char hexadecimalnum[100];
printf("Enter decimal number: ");
scanf("%ld", &decimalnum);
quotient = decimalnum;
while (quotient != 0)
{
remainder = quotient % 16;
if (remainder < 10)
hexadecimalnum[j++] = 48 + remainder;
else
hexadecimalnum[j++] = 55 + remainder;
quotient = quotient / 16;
}
// display integer into character
for (i = j; i >= 0; i--)
printf("%c", hexadecimalnum[i]);
return 0;
}23. By esaunoya
Made by Esaunoya. Takes in decimal value input by user and converts it to Hexadecimal ( Source )
#include <stdio.h>
int findMax(int decimal);
void convertDecimalToBinary(int decimal, char arr[], int max, char hexVals[]);
void printArray(char arr[], int max);
int main(void){
char hexVals[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
int decimal = -1;
int max = -1;
printf("Decimal to Hexadecimal Converter\n\n");
while(decimal < 0){
printf("Please enter a decimal number 0 or greater: ");
scanf("%d", &decimal);
if(decimal < 0)
printf("\n You have entered a number less than 0.\n\n");
}
max = findMax(decimal);
char hex[max];
printf("\n");
convertDecimalToBinary(decimal, hex, max, hexVals);
printArray(hex, max);
return 0;
}
int findMax(int decimal){
int bitLen = 0;
int mul = 1;
while(decimal >= mul){
bitLen++;
mul*=16;
}
if(bitLen==0)bitLen=1;
return bitLen;
}
void convertDecimalToBinary(int decimal, char arr[], int max, char hexVals[]){
int temp;
for(int i = 0; i < max; i++){
temp = decimal%16;
arr[(max-1)-i]=hexVals[temp];
decimal = decimal >> 4;
}
return;
}
void printArray(char arr[], int max){
for(int i = 0; i < max; i++){
printf("%c", arr[i]);
}
printf("\n\n");
return;
}24. By AZ-Haris
Made by AZ-Haris. ( Source )
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
int main()
{
int dec;
printf("Input Decimal Number : ");
scanf("%d", &dec);
printf("\nOctal = %o", dec);
printf("\nHexadecimal = %X", dec);
getch();
return 0;
}25. By fanajib5
Made by fanajib5. ( Source )
#include <stdio.h>
#include <stdlib.h>
// C++ program to convert a decimal
// number to hexadecimal number
// source = https://www.geeksforgeeks.org/program-decimal-hexadecimal-conversion/
// modified by FAIQ
int main()
{
unsigned char n[3] = {222,255,49}; //decimal
unsigned char hexaDeciNum[100];
int i = 0;
int p;
for(p=0;p<=3;p++){
while(n[p]!=0){
int temp = 0;
temp = n[p] % 16;
if(temp < 10){
hexaDeciNum[i] = temp + 48; }
else{
hexaDeciNum[i] = temp + 55; }
n[p] = n[p]/16;
temp = 0;
i++;
}}
printf("Hexadecimal = %s", hexaDeciNum);
printf("\nThe length is %d characters",strlen(hexaDeciNum));
printf("\nHex = ");
return 0;
}26. By Mantra Jain
Made by Mantra Jain. ( Source )
#include<stdio.h>
int main()
{
long int num_decimal , remainder , quotient ;
int a = 1 , b , var ;
char hexanum_decimal[ 100 ] ;
printf( " Enter decimal number: " ) ;
scanf( "%ld" , &num_decimal ) ;
quotient = num_decimal ;
while( quotient != 0 )
{
var = quotient % 16 ;
if( var < 10 )
var = var + 48 ;
else
var = var + 55 ;
hexanum_decimal[ a++ ]= var ;
quotient = quotient / 16;
}
printf( " The equivalent hexadecimal value of decimal number %ld is : " , num_decimal ) ;
for ( b = a -1 ; b > 0 ; b-- )
printf( "%c" , hexanum_decimal[ b ] ) ;
return 0 ;
}