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Width and precision specifiers can be replaced by an *, that makes printf look for the value in the arguments.
printf("%5.3f", M_PI);
is equivalent to
printf("%*.*f", 5, 3, M_PI);
but now 5 and 3 can be replaced with expressions calculated at runtime.
The rest of your exercise should be trivial.
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solved Make table for pi using C coding language [closed]