sprintf question

[chrisben]

if I do

char b[5];
sprintf(b,%-5s","A");
cout << b << "X" << endl;

I will get

A X

With 4 spaces place holder for the output. How can I create a string as

A++++X

Basically, want to output a string padded right with "+", with total length 5.

Thanks

[PanGalactic]

http://www.cplusplus.com/reference/iostream/manipulators/

Play around with setfill, setw and left or right as appropriate.

[kbw]

The buffer passed to sprintf isn't big enough and will be overrun.

[chrisben]

thanks. setfill is nice. but how can I change the value of b itself? As I need to pass this format to a string variable eventually (as assigning string s = "A++++";), and setfill seems only set the cout format.

[PanGalactic]

stringstream is what you want.

#include <sstream>

std::ostringstream os;
os << "A" << ... << "X" << endl;
std::string s = os.str();