C/C++程序员应聘常见面试题深入剖析(3)

char *GetMemory( void ) 
{ 
char p[] = "hello world"; 
return p; 
} 
void Test( void ) 
{ 
char *str = NULL; 
str = GetMemory(); 
printf( str ); 
} 

void GetMemory( char **p, int num ) 
{ 
*p = (char *) malloc( num ); 
} 
void Test( void ) 
{ 
char *str = NULL; 
GetMemory( &str, 100 ); 
strcpy( str, "hello" ); 
printf( str ); 
} 

　void Test( void ) 
{ 
char *str = (char *) malloc( 100 ); 
strcpy( str, "hello" ); 
free( str ); 
... //省略的其它语句 
} 

char *str = NULL;
GetMemory( str );

char p[] = "hello world";
return p;