CODEWITHSUNDEEP
c++io
gskishan004
gskishan004

Reputation: 55

Reading input one character at a time

For example, given "1912" as input, how do I parse this input and populate an int a[] so that it has a[0]=1, a[1]=9 and so on.

If done through a for loop it will take a[0]=1912 and not a[0]=1.

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

Upvotes: 1

Views: 2255

Answers (1)

Pradhan
Pradhan

Reputation: 16737

Use getchar to read character by character. Your loop would look like this:

for(int i = 0; i < n; i++)
{
  a[i] = getchar();
  a[i] -= '0';
}

The return value of getchar would be the ascii code for the input character. Since you are trying to read the input in as a digit, you can do that transformation by a[i] -= '0'.

Of course, the above loop does not do any input sanitization and assumes you know exactly the format you are reading. You can use feof and ferror to get for errors.

Upvotes: 1

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