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:
46 comments Page 1 of 5.
Ajmer thakur said:
2 months ago
The datatype of int is extern so is cancelled to be defined anywhere in the code.
Aniket said:
2 years ago
It shows an error msg because extern are declared inside the function.
(1)
Shubham said:
3 years ago
What is the output of this program? Please anyone explain.
Shital said:
7 years ago
If int a=20; is definition, then what about if we say int a=20; is initialisation?
(1)
Aman said:
7 years ago
a is defined outside the scope of the program. It will not even get executed.
Vishu said:
8 years ago
@Prathyusha.
You are right, answer A is corret.
You are right, answer A is corret.
Vishu said:
8 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:
9 years ago
Here, we should declare a=20 above the main function.
Laxmi said:
9 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:
9 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?
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