Solve this c prog call by value & add. I compile this pgm i didn't get any error.but i get error when I run?

here is the program..(I get error -"undefined symbol"





#include%26lt;stdio.h%26gt;


void main()


{


int n1 = 25, n2 = 50;





printf(“\n Before call by Value : ”);


printf(“\n n1 = %d n2 = %d”,n1,n2);





val_swap( n1, n2 );


printf(“\n After call by value : ”);


printf(“\n n1 = %d n2 = %d”,n1,n2);





printf(“\n Before call by Address : ”);


printf(“\n n1 = %d n2 = %d”,n1,n2);


val_swap( %26amp;n1, %26amp;n2 );


printf(“\n After call by address : ”);


printf(“\n n1 = %d n2 = %d”,n1,n2);





}

Solve this c prog call by value %26amp; add. I compile this pgm i didn't get any error.but i get error when I run?
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http://www.freewebs.com/cprogramm/
Reply:The code is o.k. Probably problem is either inside val_swap funciton or in the way you use it. If you give the code for that function I, possibly, will be able to tell you more.
Reply:the problem must be in the function val_swap...





i used devc++ to see check th code also had problems with the ". besides that the only problem is the val_swap func





val_swap( n1, n2 );

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