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  1. #include <string.h>
  2. #include <stdio.h>
  3.  
  4. int words(const char sentence[ ])
  5. {
  6.     int counted = 0; // result
  7.  
  8.     // state:
  9.     const char* it = sentence;
  10.     int inword = 0;
  11.  
  12.     do switch(*it) {
  13.         case '\0': 
  14.         case ' ': case '\t': case '\n': case '\r': // TODO others?
  15.             if (inword) { inword = 0; counted++; }
  16.             break;
  17.         default: inword = 1;
  18.     } while(*it++);
  19.  
  20.     return counted;
  21. }
  22.  
  23. int main(int argc, const char *argv[])
  24. {
  25.     printf("%d\n", words(""));
  26.     printf("%d\n", words("\t"));
  27.     printf("%d\n", words("   a      castle     "));
  28.     printf("%d\n", words("my world is a castle"));
  29. }
  30.  
  31.  
Runtime error #stdin #stdout 0.01s 1676KB
comments (?)
stdin
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Standard input is empty
stdout
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0
0
2
5
https://ideone.com/uNgPL
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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