help me plz

[miladam]

if i wanna say "do it even the line is over",how can i say it with limitation
maybe like this (??????!="\n"

i wanna give some numbers from notepad like
12.2 21 32 32
332 234 543 5642
234 433
i wanna say give just the first line.or in other words do something to the end of first or second line,got it?

[Chervil]

Could you give more details please. What do you mean by "line", is it a string? What do you mean by "over"?

[miladam]

i wanna give some numbers from notepad like
12.2 21 32 32
332 234 543 5642
234 433
i wanna say give just the first line.or in other words do something to the end of first or second line,got it?

[Chervil]

Well, you could use getline() to read the whole line and then process the contents of the line. Possibly a stringstream might be useful for parsing its contents.

#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
#include <sstream>

using namespace std;

int main ()
{
    ifstream fin("input.txt");
    string line;
    double num;
    double total;
    
    while (getline(fin, line))
    {
        total = 0;
        istringstream ss(line);
        while (ss >> num)
        {
            total += num;
            cout << setw(8) << num << " ";
        }
        cout << "  Total: " << total << endl;    
    }
}

Output:

    12.2       21       32       32   Total: 97.2
     332      234      543     5642   Total: 6751
     234      433   Total: 667

[miladam]

ok ,i use getline,now what must i do?
plz write it for me
maybe u min change string to number?yeah? with witch function?

[giblit]

yes he meant convert it to a number from word using the string streams and parsing and the function used is operator >>

[miladam]

operator?????give me an example plz

[Chervil]

give me an example plz

Just scroll up the page ... http://www.cplusplus.com/forum/beginner/117410/#msg640539

And here's the reference page for the >> operator:
http://www.cplusplus.com/reference/istream/istream/operator%3E%3E/

[miladam]

i write a program to show me row and column of file like above but that not answering in correct me.plz tell me my mistake.
#include <iostream>
#include <string>
#include<fstream>
using namespace std;

int main()
{
string s,ss;
double x,y,z;
int * f;
int a,b,c,i,j,row,col;
ifstream A;
ofstream B;
ifstream C;
A.open("C:/Users/milad/Desktop/miladam.txt");

i=0;

while (!A.eof())
{
getline(A,s);
A>>s;
i++;
}
row=i;
A.close();

f=new int [row];

for(j=0;j<row;j++)
{
getline(A,ss);

B.open("C:/Users/milad/Desktop/miladam1.txt");
B<<ss;
B.close();
C.open("C:/Users/milad/Desktop/miladam1.txt");
col=0;
while(!C.eof())
{
C>>z;
col++;
}
C.close();
cout<<col;
}
cin>>x;
return 0;
}