how to use setprecision

First you need to add a header file: Iomanip One: setprecision Function: Control the number of floating-point numbers displayed by the output stream, Setprecision (n) is the number of n output, there will be rounding. For example: Double s=20.7843000

First #include One: setprecisionFunction: Control output stream shows the number of floating-point numbers, Setprecision (n) is the output n number, there will be roundedDouble s=20.7843000;CoutCoutCoutCoutCoutCoutVisible, the fractional part at the

# Include // do not use iostream. h, there will be a lot of problems # include // Io stream control header file, mainly for some operations such as SETW (int n), setprecision (int n ), setbase (int n), setfill (char C. ▲SETW (n) usage: Generally,

// Manipulators (Stream operator) // detailed parsing // use of stream operator fixed and setprecision # include # include using namespace STD; int main () {double num = 123.45678; // by default, the maximum number of digits (including before and

A controller is an object defined in iomanip. h In the header file. Iomanip. h must be included before use 1. I/O writing format The I/0 stream is a series of input or output bytes. When the program needs to display the output on the screen, you can

CoutSetiosflags is a C + + operator that is contained in the namespace Iomanip, which is the function of executing a parameter specified by theAction within the area;Iso::fixed is one of the parameters of the operator setiosflags, which specifies

Inline Smanip (long) resetiosflags (long _l) {return Smanip (long) (__resetiosflags, _l);}inline Smanip (int) setfill (int _m) {return smanip (int) (__setfill, _m);}Inline Smanip (long) setiosflags (long _l) {return Smanip (long) (__setiosflags, _l);

C + + formatted output, C + + output format control in the output data, for the sake of simplicity, often do not specify the format of the output, by the system according to the type of data to take the default format, but sometimes you want the

C ++ controller and iomanip ControllerC ++ controller c ++ cout output format The following header files are often seen in c ++ programs.# Include Io stands for input and output, and manip stands for manipulator.The role of iomanip:This mainly

Introduction: Everyone in the program to write more or less encounter this problem, especially for some beginners will appear this problem, do an ACM contest of students will certainly use C language printf format control output, but accustomed to