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erase_demo.cpp

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#include <stdio.h>
#include <strings.h>
#include <vector>

typedef std::vector<const char *> strVec;
 
strVec::iterator
find( strVec::iterator first, strVec::iterator last, const char * value)
{
   while (first != last && strcmp(*first, value) != 0)
   {
           ++first;
   }
   return first;
} // find


void test_vector_erase( const char *searchStr )
{
   static const char *stringz[] = { "one",
                                    "two",
                                    "three",
                                    "four",
                                    "five",
                                    "six",
                                    "seven",
                                    "eight",
                                    "nine",
                                    "ten",
                                    0 };
   
   strVec v;
   strVec::iterator where;
   int i;
   const char **pStr = stringz;

   while (*pStr != 0) {
      v.push_back( *pStr );
      pStr++;
   }

   size_t len;
   len = v.size();
   printf("before erase v.size() = %d\n", len );
   for (i = 0; i < len; i++) {
      printf("v[%2d] = %s\n", i, v[i] );
   }
   printf("\n");

   // iterate over v searching for searchStr
   where = find( v.begin(), v.end(), searchStr );

   if (where != v.end()) {
      v.erase( where );
      len = v.size();
      printf("after erase v.size() = %d\n", len );
      for (i = 0; i < len; i++) {
         printf("v[%2d] = %s\n", i, v[i] );
      }
   }
   else {
      printf("The search string \"%s\" was not found\n", searchStr );
   }
} // test_vector_erase
                     

main(int argc, const char *argv[])
{
   if (argc != 2) {
      const char *progName = argv[0];

      printf("Usage: %s <search-string>\n", progName );
      printf("example: %s zorch\n", progName);
      printf("In this example, %s will search the vector for \"zorch\"\n", progName);
   }
   else {
      test_vector_erase( argv[1] );
   }
}

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