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C Program to Find the Sum of ASCII values of all Characters in a String

Posted on August 30, 2013 by staff10
This C Program finds the sum of the ASCII values of all characters that were used in a string.

Here is a source code of the C program to find the sum of the ASCII values of all characters that were used in a string. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

  1. /*
  2.  * C Program to Find the Sum of ASCII values of all Characters 
  3.  * in a String
  4.  */
  5. #include <stdio.h>
  6. #include <string.h>
  7. #include <ctype.h>
  8.  
  9. int sumascii(char [], int);
  10.  
  11. int main()
  12. {
  13.     char str1[30];
  14.     int sum;
  15.  
  16.     printf("Enter a string: ");
  17.     scanf("%s", str1);
  18.     sum = sumascii(str1, 0);
  19.     printf("The sum of all ascii values in '%s' is %d.\n", str1, sum);
  20.  
  21.     return 0;
  22. }
  23.  
  24. int sumascii(char str[], int num)
  25. {
  26.     if (num < strlen(str))
  27.     {
  28.         return (str[num] + sumascii(str, num + 1));
  29.     }
  30.  
  31.     return 0;
  32. }

$ gcc asciisum.c 
$ ./a.out
Enter a string: education
The sum of all ascii values in 'education' is 956.

Sanfoundry Global Education & Learning Series – 1000 C Programs.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer and 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 & Cluster Administration, Advanced C Programming, SAN Storage Technologies, SCSI Internals and Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him below:
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