C Program to Input 2 Binary Strings and Print their Binary Sum

«
»
This C Program takes an input to 2 binary strings and print their binary sum.

Here is a source code of the C program to input 2 binary strings and print their binary sum. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /*
  2.  * C Program to Input 2 Binary Strings and Print their Binary 
  3.  * Sum 
  4.  */
  5. #include <stdio.h>
  6. #include <string.h>
  7. #include <stdlib.h>
  8.  
  9. int bin_verify(char []);
  10. void sum(char [], char [], char []);
  11.  
  12. int main()
  13. {
  14.     char bin1[33], bin2[33], result[33];
  15.     int len1, len2, check;
  16.  
  17.     printf("Enter binary number 1: ");
  18.     scanf("%s", bin1);
  19.     printf("Enter binary number 2: ");
  20.     scanf("%s", bin2);
  21.     check = bin_verify(bin1);
  22.     if (check)
  23.     {
  24.         printf("Invalid binary number %s.\n", bin1);
  25.         exit(0);
  26.     }
  27.     check = bin_verify(bin2);
  28.     if (check)
  29.     {
  30.         printf("Invalid binary number %s.\n", bin2);
  31.         exit(0);
  32.     }
  33.     sum(bin1, bin2, result);
  34.     printf("%s + %s = %s\n", bin1, bin2, result);
  35.  
  36.     return 0;
  37. }
  38.  
  39. int bin_verify(char str[])
  40. {
  41.     int i;
  42.  
  43.     for (i = 0; i < strlen(str); i++)
  44.     {
  45.         if ((str[i] - '0' != 1 ) && (str[i] - '0' != 0))
  46.         {
  47.             return 1;
  48.         }
  49.     }
  50.  
  51.     return 0;
  52. }
  53.  
  54. void sum(char bin1[], char bin2[], char result[])
  55. {
  56.     int i = strlen(bin1) - 1;
  57.     int j = strlen(bin2) - 1;
  58.     int carry = 0, temp, num1, num2;
  59.  
  60.     while (i > -1 && j > -1)
  61.     {
  62.         num1 = bin1[i] - '0';
  63.         num2 = bin2[j] - '0';
  64.         temp = num1 + num2 + carry;
  65.         if (temp / 2 == 1)
  66.         {
  67.             carry = 1;
  68.             temp %= 2;
  69.         }
  70.         if (i > j)
  71.         {
  72.             result[i + 1] = temp + '0';
  73.             result[strlen(bin1) + 1] = '\0';
  74.         }
  75.         else
  76.         {
  77.             result[j +1] = temp + '0';
  78.             result[strlen(bin2) + 1] = '\0';
  79.         }
  80.         i--;
  81.         j--;
  82.     }
  83.     while (i > -1)
  84.     {
  85.         temp = bin1[i] + carry - '0';
  86.         if (temp / 2 == 1)
  87.         {
  88.             carry = 1;
  89.             temp %= 2;
  90.         }
  91.         result[i + 1] = temp + '0';
  92.         i--;
  93.     }
  94.     while (j > -1)
  95.     {
  96.         temp = bin2[j] + carry - '0';
  97.         if (temp / 2 == 1)
  98.         {
  99.             carry = 1;
  100.             temp %= 2;
  101.         }
  102.         result[j + 1] = temp + '0';
  103.         j--;
  104.     }
  105.     if (carry)
  106.     {
  107.         result[0] = '1';
  108.     }
  109.     else
  110.     {
  111.         result[0] = '0';
  112.     }
  113. }

advertisement
$ gcc binarynum.c
$ ./a.out
Enter binary number 1: 0110 
Enter binary number 2: 1011
0110 + 1011 = 10001

Sanfoundry Global Education & Learning Series – 1000 C Programs.

advertisement

Here’s the list of Best Reference Books in C Programming, Data-Structures and Algorithms

If you wish to look at programming examples on all topics, go to C Programming Examples.

advertisement
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn