Homework help

[f0fin]

This is my last question to answer on my homework assignment and I'm borderline about to rip my hair out If someone could please assist me

#include<stdio.h>
#include<stdlib.h>

int main()

{
int n;
int a = 2;
int b[2];
int c = 3;
int i;
scanf("%d", &n);

for(i = 0; i < n; i++){
b[i] = n * i;
}


printf("value of a=%d, c=%d\n", a, c);

for(i = 0; i < n; i++){

printf("b[i] = %d\n", b[i]);

}
return 0;
}

1.What is the problem with the above code snippet?
2.Why does it exhibit the behavior it does? Explain. How do you fix it?

[nonpuz]

There are several problems. Which one in particular are you having trouble with?

[std10093]

Since b is an array with dimension two, we should check the input to be sure that n is not more than two AND not less than zero. You can easily do this with an if statement.
With the code you provided, if you input 10 for example, you will that the values of a and c may not be the ones you expected, because of the array overflow!

[nonpuz]

You just gave him the answer flat out ...

[vart]

what is the size of the array?
What will happen if user enters value bigger than array size?
How should you fix the problem?

[std10093]

You just gave him the answer flat out ...

Partially true. Sorry. :/

[ddutch]

int n;
int b[2];

scanf("%d", &n);

for(i = 0; i < n; i++)

b[i] = n * i;


What will happen if a user, during scanf(), for example enters 4 and your for-loop counter 'i' gets a value greater than 1 ?
Does for example b[3] exists, what will happen if you assign a value to an undeclared memory location ?

[f0fin]

Since b is an array with dimension two, we should check the input to be sure that n is not more than two AND not less than zero. You can easily do this with an if statement.
With the code you provided, if you input 10 for example, you will that the values of a and c may not be the ones you expected, because of the array overflow!

Thanks alot! Haha although the answer was given flat out I would've understood if someone just mentioned array overflow. I'm so used to java where it would through out of bounds exceptions.