CODEWITHSUNDEEP
clistdata-structuresstructtypedef
user3388579
user3388579

Reputation: 33

Reading integers into a ADT from stdin

This is my abstract data structure

 typedef struct {
    int *items;
    int size;
 } List;

I would like the user to enter integers on a single line such as

  a.out 
  12 14 2 8 9

and read them into the List. I understand how to add to a list, i guess the thing i don't get is getting the integers from a single line input

Edit: Sorry but I meant using something like scanf not with command line arguments

Upvotes: 1

Views: 71

Answers (2)

ameyCU
ameyCU

Reputation: 16607

1. Definition of your main should be int main(int argc,char **argv)

2. The numbers will command line arguments (check value of argc greater than 1 before using argv ).

3. argv[1] , argv[2] will have these numbers , but as string .

4. Convert these to integers using atoi or sscanf functions and store in structure members as you desire.

EDIT

Edit: Sorry but I meant using something like scanf not with command line arguments

You can use fgets , tokenize string using strtok and then convert and store into integer variable.

Upvotes: 1

HDJEMAI
HDJEMAI

Reputation: 9800

You have to use input arguments like:

Your main function will look like: int main (int argc, char *argv[] )

In this case you can add your argument at command line as you would

./a.out 12 14 2 8 9

And you can access those argument by argv[1], argv[2], argv[3], ...

and you can loop over the number of arguments the user provided which is contained in the argc variable

example to access the first argument:

int i;

i= atoi(argv[1]);

Upvotes: 0

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