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A function f() will can be defined as returning a pointer to a character with the syntax
char *f()
{
}
One must be careful in creating these functions that the character pointer is set to point to a static variable or an allocated string; an automatic variable will vanish when the function exits, leaving the pointer invalid.
I should point out that this is very basic C syntax. If this question is being asked as part of a school assignment, I must suggest that perhaps you should drop this course now, as it will be immeasurably harder as you get further into it.
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C program pointers to pointers examples?
Pointer to Pointer is a double pointer, denoted by (**). Pointer stores the address of the variable and pointer to pointer stores the address of a pointer variable and syntax can be given as int **ptr2ptr;
Which two pointer does not increment or decrement in arithmetic array?
constant pointer and character pointer
Which is the unary operator used to dereference a pointer and return the value stored in it?
The asterisk (*) operator dereferences a pointer and returns the value stored in the memory pointed to by the pointer.
Does having a void double pointer make sense in C?
No, 'void *' and 'double *' are ok; 'void double *' is syntax error.On the other hand 'void **p' is totally correct: p holds the address of a generic pointer.
How do you declare a pointer to a character string in c?
char *ptr;
C program pointers to pointers examples?
Pointer to Pointer is a double pointer, denoted by (**). Pointer stores the address of the variable and pointer to pointer stores the address of a pointer variable and syntax can be given as int **ptr2ptr;
What is Fgetc and fputc in c?
fgetc gets a character from a file using a file pointer.the syntax is fget(fp) where fp is a pointer to the file
Function pointer that will point to a function that takes integer value and return character?
Answerchar (*funcp(int));
Which two pointer does not increment or decrement in arithmetic array?
constant pointer and character pointer
What is pointer to pointer with examle?
int main (int argc, char **argv):Hereargv is a pointer to a pointer (points to the first element of a pointer-array)argv[0] is a pointer (points to the first character of a string)argv[0][0] is a character
How do you write a function called mystrlen that receives a pointer to a character string so that the function return the length of the string?
int mystrlen (const char *s) { const char *t; if (!s) return 0; for (t=s-1;*++t;); return t-s; }
Which is the unary operator used to dereference a pointer and return the value stored in it?
The asterisk (*) operator dereferences a pointer and returns the value stored in the memory pointed to by the pointer.
Does having a void double pointer make sense in C?
No, 'void *' and 'double *' are ok; 'void double *' is syntax error.On the other hand 'void **p' is totally correct: p holds the address of a generic pointer.
How do you declare a pointer to a character string in c?
char *ptr;
What is return type of string in c?
In C programming, a string doesn't have a specific return type as it's essentially an array of characters. So, if a function is returning a string, it should be declared to return a pointer to a char (char*), since a string in C is represented as an array of characters terminated by a null character ('\0').
Why void is used in c language?
void as function return-type means no return value void as function parameter means no parameter void * as pointer type means generic pointer
Why do you use a void pointer in a programme?
void is type of pointer that usually means that you can make it point to any data type. When you make a pointer point to somewhere its data type should match with the place where you want it to point. When you dont know the data type where it will point to then you can declare a void pointer and make it point to the data type it want.
