Consider a c++ template funtion
template<class T>
T& Add(T a, T b){return a+b ;}
if this function is called as
T c = Add("SAM", "SUNG");
what will happen? What is the problem in the template
declaration/ How to solve the problem.
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Answer Posted / skc
The error is adding Two pointers isn't alowed in C/C++.
The compiler imlicitly treats "SAM" as const char*. We need
to write a function with "explicit" keyword declaration like
explicit char * Add (const char* x1, const char* x2)
{
// check for null pointers.
// allocate strlen(x1)+strlen(x2)+1 using malloc
// say char*a1 = malloc...;
// check if malloc returns null..take corrective actions
// strcpy (a1, x1);
// strcat (a1, x2);
//strcat (a1, '\0');
return a1; // ask the caller to free the memory allocated
// for a1
}
since this function is writen explicit the compiler will
invoke this function and not call the default template
function.
this is what appears to me. haven't coded and verified.
// Regards, SADIQ
| Is This Answer Correct ? | 4 Yes | 4 No |
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