stringstream << version of sprintf with variable precision?

[acppdummy]

I would like to rewrite something like

sprintf(str, "%d, %.1lf, %.3lf, %.2lf, ...", a, b, c, d, ....)

to something like

stringstream str<<a<<fixed<<b<<c<<d ...

But is there a way to specify varying precision easily (there are about 100 values to be converted to a string with varying precisions.)? Something like

... <<%.1<<b<<%.3<<c<<%.2<<d ...

Possible? If so then what's the syntax? Thanks!

[laserlight]

You could look into Boost.Format.

[greve]

setprecision() may help. Consider to include <iomanip>.