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Number Conversion in C Language


Here we written code to Convert Decimal to Binary or Hexa decimal by user choice.

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Task: Write a C program to Convert Hexa decimal value to Binary and vice versa.

Write a C Program to convert decimal to binary and hex (using switch call function the function)

#include <stdio.h>
void dectobin(long int);
void dectohex(long int);
void main()
   int c;
   long num;
   printf(“Enter a decimal integer: “);
   scanf(“%ld”, &num);
   printf(“1. Decimal TO Binary\n2. Decimal to HexaDecimal\n”);
   printf(“Choose conversion type : “);
   printf(“Input number is : %ld”,num);
   switch (c)
      case 1:
      case 2:
         printf(“\nWronge choice\n”);
void dectobin(long int dec_num)
   int i=0,remainder;
   char bi[1024];
   while (dec_num > 0)
      remainder = dec_num % 2;
      dec_num = dec_num / 2;
   printf(“Its binary equivalent is : “);
void dectohex(long int dec_num)
   int i=0,remainder;
   char he[1024];
      remainder = dec_num % 16;//To convert integer into character
      if( remainder < 10)
         remainder =remainder + 48;
         remainder = remainder + 55;
      he[i++]= remainder;
      dec_num = dec_num / 16;
   printf(“\nIts hexa equivalent is : “);

Enter a decimal integer: 16
1. Decimal TO Binary
2. Decimal to HexaDecimal
Choose conversion type : 2
Input number is : 16
Its hexa equivalent is : 10

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