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      char a[] = “hello”;
      char b[10];
      strcpy( b, a); //²»ÄÜÓÃif( b == a)
      …….
// Ö¸Õë
      int len = strlen(a);
      char *p = (char *)malloc( sizeof(char) * ( len + 1) );
      strcpy( p, a); // ²»ÄÜÓà p = a;
      if( strcmp( p, a ) == 0 ) // ²»ÄÜÓÃif( p == a )
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