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copied!<p>Pass parameters by char *& will fix the problem.</p> <pre><code>#include <stdio.h> #include <string.h> void reassgnReference( char * &ba, char * &num ); void reassgnPointerToPointer( char ** ba, char ** num ); int main( int argc, char ** argv ) { if ( argc > 4 ) { char * ba = new char[strlen( argv[ 4 ] ) + 1]; char * num = new char[strlen( argv[ 2 ] ) + 1]; strncpy( ba, argv[ 4 ], strlen( argv[ 4 ] ) ); strncpy( num, argv[ 2 ], strlen( argv[ 2 ] ) ); printf( "In the beginning, ba = %s, num = %s\n", ba, num ); reassgnReference( ba, num ); printf( "reassgnReference(), ba = %s, num = %s\n", ba, num ); reassgnPointerToPointer( &ba, &num ); printf( "reassgnPointerToPointer(), ba = %s, num = %s\n", ba, num ); } else { printf( "%s Expects at least 4 arguments\n", argv[ 0 ] ); } return( 0 ); } void reassgnReference( char *& ba, char *& num ) { delete[] ba; delete[] num; char const * const newBa = "ba from reference"; char const * const newNum = "num from reference"; ba = new char[strlen( newBa ) + 1]; num = new char[strlen( newNum ) + 1]; strncpy( ba, newBa, strlen( newBa ) ); strncpy( num, newNum, strlen( newNum ) ); } void reassgnPointerToPointer( char ** ba, char ** num ) { delete[] *ba; delete[] *num; char const * const newBa = "ba from pointer to pointer"; char const * const newNum = "num from pointer to pointer"; *ba = new char[strlen( newBa ) + 1]; *num = new char[strlen( newNum ) + 1]; strncpy( *ba, newBa, strlen( newBa ) ); strncpy( *num, newNum, strlen( newNum ) ); } </code></pre>

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