C Programming - Declarations and Initializations - Discussion
Discussion Forum : Declarations and Initializations - General Questions (Q.No. 10)
10.
In the following program where is the variable a getting defined and where it is getting declared?
#include<stdio.h>
int main()
{
extern int a;
printf("%d\n", a);
return 0;
}
int a=20;
Answer: Option
Explanation:
- During declaration we tell the datatype of the Variable.
- During definition the value is initialized.
Discussion:
44 comments Page 1 of 5.
Shubham said:
2 years ago
What is the output of this program? Please anyone explain.
Shital said:
5 years ago
If int a=20; is definition, then what about if we say int a=20; is initialisation?
Aman said:
6 years ago
a is defined outside the scope of the program. It will not even get executed.
Vishu said:
6 years ago
@Prathyusha.
You are right, answer A is corret.
You are right, answer A is corret.
Vishu said:
6 years ago
@Jyoti.
Here is the code.
#include <stdio.h>
int main()
{
int i,j,n;
printf("enter the num:");
scanf("%d",&n);
for(i = 1; i <= n; i++)
{
for(j = 1; j <=n-i ; j++ )
printf(" ");
for(j = 1; j <= i; j++)
printf("* ");
printf("\n");
}
return 0;
}
Here is the code.
#include <stdio.h>
int main()
{
int i,j,n;
printf("enter the num:");
scanf("%d",&n);
for(i = 1; i <= n; i++)
{
for(j = 1; j <=n-i ; j++ )
printf(" ");
for(j = 1; j <= i; j++)
printf("* ");
printf("\n");
}
return 0;
}
Deepak said:
7 years ago
Here, we should declare a=20 above the main function.
Laxmi said:
7 years ago
extern int a=2; it is a definition. Because variable a is initialized to 2 then memory is created for a. That's why we call it as a definition.
Anusha said:
7 years ago
If we give like this extern int a = 2;
Is it a declaration or definition?
Please can someone explain this?
Is it a declaration or definition?
Please can someone explain this?
Mounika said:
7 years ago
Absolutely option A is correct answer.
But, declaration is outside of the main function.
So, could you please explain more about that?
But, declaration is outside of the main function.
So, could you please explain more about that?
Ramya said:
7 years ago
Will you explain please?
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