S13 Answer

/* Puzzle S13 — Starts with */
#include <stdio.h>
#include <stdlib.h>

int startsWith( char const *bigString, char const *start )
{
  while ( *bigString && *start && *bigString == *start )
  {
    bigString++; start++;
  }
  return !*start;
}

int main(int argc, char *argv[])
{
 char *trials[][2] =
  {
    {"a", "a"},
    {"ab", "a"},
    {"ab", "ab"},
    {"ab", "ax"},
    {"abcdef", "a"},
    {"abcdef", "x"},
    {"abcdef", "ab"},
    {"abcdef", "abx"},
    {"abcdef", "abc"},
    {"abcdef", "abcx"},
    {"abcdef", "abcdef"},
    {"a", "ab"},
    {"abc", "abcd"},
    {"abc", "abcdef"},
    {"abcdef", "abcdefx"},
    {"abcdef", "abcdefxyz"},
    {"abcdef", "fooey"},
    {"abcdef", "rats"},
    {"aaaaaa", "a"},
    {"abcdefg", "g"},
    {"applecart", "apple"},
    {"green", "apple"},
    {"apple", ""},
    {"", "rats"},
    {"",""}
  };

  int j; char *loc;
  for ( j=0; j<sizeof(trials)/sizeof(trials[0]); j++ )
  {
    int result = startsWith( trials[j][0], trials[j][1] ) ;
    if ( result )
      printf("%s\t          starts with\t%s\n", trials[j][0], trials[j][1] );
    else
      printf("%s\t does not start  with\t%s\n", trials[j][0], trials[j][1]  );
  }

  system("PAUSE");
  return 0;
}

Comments: