Skip leading whitespaces but not the newline C++ istreams - c++

Question

I am trying to remove leading whitespace and store the characters after the whitespace. I don't want the newline to be considered
This is a file that I am reading from:
Map: Out of planet
Player: Max
My expected result and what I am looking for should be
cout << kill.killMap << endl;
Out of planet // NOTICE THERE IS NO WHITESPACE
cout << kill.player << endl;
Max // NOTICE THERE IS NO WHITESPACE
If the file looks like this...
Map:
Player: Max
Nothing should be stored in the map variable and player variable.
Although the ws function removes whitespace from the stream, I don't think it does the same with char arrays. Would really appreciate it if someone could tell me a way of getting ws to work or just simply an efficient way of removing the whitespace
This is what I am getting:
cout << kill.killMap << endl;
Out of planet //THERE IS WHITESPACE
cout << kill.player << endl;
Max //THERE IS WHITESPACE
Is there a way of doing this without using C++ strings or Vectors. I intend on using C Style strings
THIS IS MY EDITED CODE, HOWEVER IT DOESN'T WORK IF THERE ARE VALID CHARACTERS AFTER THE DELIMITER :... WOULD REALLY APPRECIATE IT IF SOMEONE COULD FIX MY CODE, WOULD MEAN A LOT TO ME.
istreams.get(characters, 50, ':');
istreams.get(c);
istreams.getline(kill.killMap, 35);
while ((is.get(c) != "\n") && (is.get(c) != '\0') )
{
is >> ws;
}
is.getline(kill.killMap, DATA_FILE_SIZE);
if(kill.killMap[0] = '\0)
{
cout << "Error;
break;
}
istreams >> ws;
istreams.get(characters, 50, ':');
istreams.get(c);
while ((is.get(c) != "\n") && (is.get(c) != '\0') )
{
is >> ws;
}
istreams.getline(kill.player, 35);
if(kill.player[0] = '\0)
{
cout << "Error;
break;
}

Answer 1

You can do something like this:
void eatwhites(istream& stream)
{
const string skip=" \t";//put here all wanted skip chars (here i put only SPACE and TAB
while(string::npos != skip.find(stream.peek())){ //if next char in stream exist in skip string
stream.ignore();//then ignore it (1 character).
}
}
EDIT
Here is how i tested it and it works for me:
note you still have to trim the string after you read it, means put the '\0' after the last non white character.
if there is a problem you can tell what input it was and what have you got.
int main()
{
string s1,s2;
eatwhites(cin);
getline(cin,s1, ':');//read until ":"
eatwhites(cin);
getline(cin,s2); //read until "\n"
cout<<"'"<<s1<<"':'"<<s2<<"'"<<endl;
return 0;
}
inputs I've tried:
[SPACE] 123:[SPACE] 456 gives: '123':'456'
[SPACE] 123:[SPACE] gives: '123':''
EDIT2:
With char array it can be used just the same, like this:
#define MAX_FIELD 128
int main()
{
char s1[MAX_FIELD],s2[MAX_FIELD];
eatwhites(cin);
cin.getline(s1, MAX_FIELD, ':');
eatwhites(cin);
cin.getline(s2, MAX_FIELD);
cout<<"'"<<s1<<"':'"<<s2<<"'"<<endl;
return 0;
}
Same results for same input.