Basic C programming
 

#include<stdio.h>
void main()
{
printf("%d",printf("Computer"));
}



has a output = 8

Why ? please explain someone.
:confused:

Re: Basic C programming
 

Can you explain what is %d used for and that would give you your answer.

Re: Basic C programming
 

why are you making two calls to printf for? also you formating is returning the length of the text computer. Computer is 8 characters long. when using printf you need to use a format that goes with your data type. Your using decimal %d instead of string %s and making an additional call to printf as well. Try this


additionally you need to use some sort of debugger or make a scanf reference to see the output.


in practice you don't call scanf like that(without formatting) but it will exit the program one you press enter allowing you to check the output. I'd say use system("PAUSE"); but that is windows only.

Re: Basic C programming
 

The code is valid, the output should actually be "Computer8". 8 is returned by printf, which returns the number of characters it prints.

Re: Basic C programming
 

Why dont we use '&' in the case of strings in function scanf ??

e.g. :-


scanf("%s",date);

here date is a character array means string.
There is no & before date :(
This the part of a code.


Plz help

Re: Basic C programming
 

Because date is already a pointer.

Re: Basic C programming
 

Even I had the same question what vivek is asking to you? But, Now I got it that date is already a pointer then it should be use scanf("%s",date) like that. I am learning the C language, So this information will really be useful for me.

Re: Basic C programming
 

The ampersand symbol '&' otherwise known as the address operator takes in the address of a certain variable. the scanf function requires addresses so therefore the '&' is necessary for data types such as int, short, long, double, float, etc....the fact the date is already a pointer (variables that hold ONLY addresses), there is no need to use the '&' to retrieve the address since this is what they are already holding.