0
Using pointers. write a function that receives a character string and a character as argument and deletes all occurrences of this character in the string?
guys ..... instead of using actual pointer arguments i have used parameters ...
this will give you a far better idea of using pointers ........and i have used setbuf function because i am using emacs , it buffers output !!...... just enjoy
#include<stdio.h>
#include<string.h>
void main()
{
char ch,str[25],del[25];
char *p,*q,*r;
int i;
setbuf(stdout,NULL);
printf("\nenter the string:-\n");
gets(str);
setbuf(stdout,NULL);
printf("\nenter the character:-\n");
gets(&ch);
p=str;
r=del;
q=&ch;
delete(p,q,r);
printf("\nthe string with the deleted characters is:-\n%s",del);
}
delete(char *p,char *q,char *r)
{
while(*p!='\0')
{
if(*p!=*q)
{
*r=*p;
r++;
p++;
}
else
{
p++;
continue;
}
}
*r='\0';
}
What else can I help you with?
What is scanF function?
scanf() is an input function which reads input from the standard input devices such as keyboard. Syntax: scanf("Control Character",address_list); where control character is a sequence of one or more character such as %d,%f,%lf,%lld. Address list specifies the variables, pointers etc. e.g. scanf("%d",&num);
Function prototype in c?
Yes. Examples can be found in stdio.h
What are function pointers?
Function Pointers are basically used when we want to select a function which is to be used dynamically at run time.AnswerFunction pointers are the only way for "Interept programming". In UNIX all the Interepts are called using function pointers. This is mainly used in system programming. Answerits nothing but a pointer to function. which is similar to ptr to a variable, if we are saying ptr to a variable then it will hold address of the variable like that fn. ptr will have the address of the function.. one of the major application of the function pointer is call back function.. i.e callback.AnswerPointers to functions/methods/subroutines aka 'Delegates' are frequently used in .NET programming especially in EventHandling, MemberInvoking A function pointer is used to pass a function as an argument to another function, or to store a function as a data item, for example a list of functions can be implemented as an array of pointers to functions. Function pointers are used to store interrupt handlers in tables.
Is Use of pointers in function saves the memory space?
No. But avoiding unnecessary duplication of data does.
How do declare function pointer having two integer parameters and returning integer pointers?
// declare a function int* function(int, int); or int* (function)(int, int); // declare a pointer to a function int* (*pointer_to_function)(int, int);
Why you use pointers?
Because you can produce fast and efficient code. Function arguments are passed "by value", and so you can't change the original value of the argument, but if you use pointers, you can.
Why use pointer?
Because you can produce fast and efficient code. Function arguments are passed "by value", and so you can't change the original value of the argument, but if you use pointers, you can.
What is virtual function table?
A virtual function table is a table of pointers to functions.
What is scanF function?
scanf() is an input function which reads input from the standard input devices such as keyboard. Syntax: scanf("Control Character",address_list); where control character is a sequence of one or more character such as %d,%f,%lf,%lld. Address list specifies the variables, pointers etc. e.g. scanf("%d",&num);
What is meant by passing function to another function in c plus plus?
Just as pointers can point to variables, pointers can also point to functions. Thus you can pass function pointers to functions. In so doing, you can alter the behaviour of the function by having it call dynamically call arbitrary functions rather than just preset functions.
Function prototype in c?
Yes. Examples can be found in stdio.h
Where are array of functions used?
Function Pointers are basically used when we want to select a function which is to be used dynamically at run time.
What are function pointers?
Function Pointers are basically used when we want to select a function which is to be used dynamically at run time.AnswerFunction pointers are the only way for "Interept programming". In UNIX all the Interepts are called using function pointers. This is mainly used in system programming. Answerits nothing but a pointer to function. which is similar to ptr to a variable, if we are saying ptr to a variable then it will hold address of the variable like that fn. ptr will have the address of the function.. one of the major application of the function pointer is call back function.. i.e callback.AnswerPointers to functions/methods/subroutines aka 'Delegates' are frequently used in .NET programming especially in EventHandling, MemberInvoking A function pointer is used to pass a function as an argument to another function, or to store a function as a data item, for example a list of functions can be implemented as an array of pointers to functions. Function pointers are used to store interrupt handlers in tables.
Character arrays using pointers notes?
i don't know ask someone else
What are functions and pointers in c?
function-these are self contained block of statements to solve a particular task whereas pointers are defined as the variable which stores the address of another variable
Is Use of pointers in function saves the memory space?
No. But avoiding unnecessary duplication of data does.
Is it possibly to return an array of strings in a function without using pointers in C plus plus?
No.
