stringstream << version of sprintf with variable precision?

I would like to rewrite something like

Code:

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

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to something like

Quote:

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

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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

Code:

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

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

You could look into Boost.Format.

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