C++ programming, editing function to return string instead of char.?

Question

This function used to return a single letter. How can I change it so it could return a string of 6 characters?

char pop(stack *s)
{
char pop;
pop=s->cars[s->top];
s->cars[s->top]='\0';
s->top--;

return pop;
}

Answer 1

Hi,

The variable name pop and function name cannot be same.
I suppose you are having a structure stack. something like this:

struc stack
{
char cars[10][7];
int top;
};

Also here I am considering u are using C language and want to store 10 cars each of whose name is of at the most of 6 characters.

char* pop_operation(stack *s)
{
char *pop;
pop=(char *)malloc(sizeof(char)*7); // In C++, use
// pop =new char[7];
strcpy(pop,s->cars[s->top]);
s->cars[s->top]='\0';
s->top--;
return pop;
}


Where ever u r calling this function, note u have to declare a string pointer before by writing,

char *str;

and at the time of call as

str=pop_operation(strucure variable or pointer as u did earlier);

U can print it as u print other strings.

In case of further more clarifications, u may query me again.

OM NAMAH SHIVAY

Answer 2

What you are wanting to return is a C-String, or character array. Simply declare char pop as a array of 6 characters

char pop[5];

then fill the values into the pop array, and return the value when your done with the function.