C Exercises: Convert a decimal number to hexadecimal

C For Loop: Exercise-55 with Solution

Write a C program to convert a decimal number to hexadecimal.

Visual Presentation:

Sample Solution:

C Code:

#include <stdio.h>  // Include the standard input/output header file. 
void main(){
  // Declare variables
long int decn,rmd,q,dn=0,m,l;
int i=1,j,tmp;
char s;
  // Print output header  
printf("\n\nConvert Decimal to Hexadecimal:\n ");
printf("-------------------------\n");
  // Get decimal input
printf("Input any Decimal number: ");
scanf("%ld",&decn);
  // Store input
  q = decn;
  // Convert decimal to hex
  // Repeatedly divide decimal by 16
for(l=q;l>0;l=l/16){
    // Get remainder
tmp = l % 16;
    // Convert to hex digit
if(tmp< 10){
tmp =tmp + 48; 
}else{
tmp = tmp + 55;
    }
        // Accumulate hex number  
dn=dn*100+tmp; 
  }
  // Print hex number
printf("\nThe equivalent Hexadecimal Number : ");
  // Print hex digits  
for(m=dn;m>0;m=m/100){
    s=m % 100;
printf("%c",s);
  }
printf("\n\n");
}

Sample Output:

Convert Decimal to Hexadecimal:                                                                               
 -------------------------                                                                                    
Input  any Decimal number: 79                                                                                 
                                                                                                              
The equivalent Hexadecimal Number : 4F 

Flowchart:

C Programming Code Editor:

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