C Programming - Pointers - Discussion
Discussion Forum : Pointers - Point Out Errors (Q.No. 2)
2.
Point out the error in the program
#include<stdio.h>
int main()
{
int a[] = {10, 20, 30, 40, 50};
int j;
for(j=0; j<5; j++)
{
printf("%d\n", a);
a++;
}
return 0;
}
Discussion:
65 comments Page 4 of 7.
Sam said:
1 decade ago
Here to do the computation left hand value of array are required, but here a is treated as simple variable in for loop not as array that why error is coming.
Coder x said:
8 years ago
"Lvalue required" means you cannot assign a value to something that has no place in memory. Basically you need a variable to be able to assign a value.
(1)
Coder x said:
8 years ago
You cannot increment and decrement operations on the array directly. You need a pointer to be able to access the values of the pointer.
Kausa chan said:
5 years ago
No, @Kiran.
Because ptr is just pointer to an integer and you're storing the address of an array to it so it will throw an error.
Because ptr is just pointer to an integer and you're storing the address of an array to it so it will throw an error.
(1)
Chai said:
1 decade ago
@Apu: Lvalue and Rvalue means left hand side and right hand side respectively, required while doing the assignment operation.
Vallinayagam said:
7 years ago
In an array, it is not possible to perform increment/decrement by using the array name. If we want we can use a pointer.
(1)
Keerthi said:
1 decade ago
How to rewrite the program without error? I can't understand from above explanation? any one can do this?
Sonu said:
1 decade ago
Lvalue means adressable value where rvalue means actual value ie location and read value respectively.
Nani said:
6 years ago
We can't do. a=a+1;
Because base address will change. This is illegal. If a is pointer we can do it.
Because base address will change. This is illegal. If a is pointer we can do it.
(2)
Maniikanta said:
9 years ago
Can I declare a pointer like,
int **p;
Is this is correct or wrong? Please explain the reason.
int **p;
Is this is correct or wrong? Please explain the reason.
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