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I am trying to populate a string with a double value using a sprintf like this:
sprintf(S, "%f", val);
But the precision is being cut off to six decimal places. I need about 10 decimal places for the precision.
How can that be achieved?
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The C++ setprecision can also be used to format only the decimal places instead of the whole floating-point or double value. This can be done using the fixed keyword before the setprecision() method.
%d stands for decimal and it expects an argument of type int (or some smaller signed integer type that then gets promoted). Floating-point types float and double both get passed the same way (promoted to double ) and both of them use %f .
%[width].[precision]
Width should include the decimal point.
%8.2 means 8 characters wide; 5 digits before the point and 2 after. One character is reserved for the point.
5 + 1 + 2 = 8
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