splitting a string into different arrays

Question

My input format the number of types of items, followed by N (N - no.of items) lines each representing a pair of integers in the format L B where L is the length of the item and B is the breadth of the item.

Sample input format:
2
1 1
5 4

My question is how send all lengths into one array and all breadths into one array with out using vectors in C++. I know these kind of questions were already asked by people but I couldn't figure out how to send them to two different arrays.

my program should run in a sandbox. Sandbox automatically gives input to the program. So I have to write my program in a way that takes the above input format

Would help to know how you get that input. Is it a txt file? — powder
– powder, Commented Nov 18, 2013 at 17:21
Its not a text file. my program should run in a sandbox. Sandbox automatically gives input to the program. So I have to write my program in a way that takes the above input format — user3005614
– user3005614, Commented Nov 18, 2013 at 17:25

Shubham · Accepted Answer · 2013-11-18 17:40:23Z

1

cin >> n;
int *l,*b;
l = new int[n];
b = new int[n];

for(int i=0; i<n; ++i) {
  cin >> l[i] >> b[i];
}

edited Nov 18, 2013 at 17:40

answered Nov 18, 2013 at 17:19

Shubham

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5 Comments

user3005614 Over a year ago

I will enter the whole string 1 1 at a time with a space in the middle. Do I not need to split the string by space

Shubham Over a year ago

Yes, a space is needed to seperate the two integers. Also you can enter your numbers with any number of spaces or newlines, just the order matters.

HeywoodFloyd Over a year ago

The length of the array has to be a constant known at compile time, so you can't declare them like that. Use std::vector<int> l(n), b(n). Since vectors return references, the subsequent lines in the loop will still work.

user3005614 Over a year ago

@HeywoodFloyd Can you tell me other way without vectors. Thanks

HeywoodFloyd Over a year ago

user3005614, the edited code above will do it. However, you'll need to free up the l and b arrays when you're done with them, or you'll have a memory leak.

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