Print number of distinct characters in a string.

How do I implement a C program that reads a string and prints a table with the number of occurrences of each character in the string.
Ex: Rubber. r = 2, u = 1, b = 2, e = 1.
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jbode

  • Aug 31st, 2012
 

Simple, fairly brain-dead example. Assumes any input characters fall into the range [0...CHAR_MAX). 

Code
  1. #include <stdio.h>

    2. 

  2. #include <ctype.h>

    3. 

  3. #include <limits.h>

    4. 

  4. "USAGE: %s <string>

    5. 

  5. ""%c: %02d

    6. 

  6. ""%x: %02d

    7. 

  7. ", i, counts[i]);

    8. 

  8.       }

    9. 

  9.     }

    10. 

  10.   }

    11. 

  11. }

    12. 

  12.  

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