how do you get the while loop to let you input either first or last and first an
ID: 3765576 • Letter: H
Question
how do you get the while loop to let you input either first or last and first and last and get the data you want and not just first and last?
while(!input.eof() )
{
input>>first>>last>>phone;
if
((f==first) && (l==last))
cout<<f<<" "<<l<<" "<<phone<<endl;
else if
((f==first) && (l==""))
cout<<f<<" "<<l<<" "<<phone<<endl;
else if
((f=="")&&(l==last))
cout<<f<<" "<<l<<" "<<phone<<endl;
done=true;
}
Explanation / Answer
You are almost there, but with a little bit of modification:
while(!input.eof() ) //Till you reach the end of file.
{
input>>first>>last>>phone; //Reads the 3 fields of each line into first, last, and phone.
if ((f==first) && (l==last) //If first and last both are entered, check with both the values, and if matches print all data.
cout<<f<<" "<<l<<" "<<phone<<endl;
else if(f==first) //If not both the values, if first is entered, check with first, and if matches print all data.
cout<<f<<" "<<l<<" "<<phone<<endl;
else if(l==last) //If second is entered, check with second, and if matches print all data.
cout<<f<<" "<<l<<" "<<phone<<endl;
done=true;
}
If you have any further queries, just get back to me.
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