LMU/musrfit
LMU/musrfit
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Merged muonspin/musrfit into master

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Zaher Salman 2015-09-08 09:33:54 +02:00
commit 4df380370b
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src/tests/iotests/iotests.C Normal file
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// in order to illustrate the c++ io stream formatting
// usage: 1) start root
// 2) root 5.34.x -> .L iotests.C // root 6.x.y -> .L iotests.C+
// 3) iotests()
#include <iostream>
using namespace std;
void dump_ioflags(const ios_base::fmtflags flags)
{
cout << endl << ">> flags decoded:" << endl;
if (flags & ios_base::boolalpha)
cout << ">> read/write bool elements as alphabetic strings (true and false)." << endl;
if (flags & ios_base::showbase)
cout << ">> write integral values preceded by their corresponding numeric base prefix." << endl;
if (flags & ios_base::showpoint)
cout << ">> write floating-point values including always the decimal point." << endl;
if (flags & ios_base::showpos)
cout << ">> write non-negative numerical values preceded by a plus sign (+)." << endl;
if (flags & ios_base::skipws)
cout << ">> skip leading whitespaces on certain input operations." << endl;
if (flags & ios_base::unitbuf)
cout << ">> flush output after each inserting operation." << endl;
if (flags & ios_base::uppercase)
cout << ">> write uppercase letters replacing lowercase letters in certain insertion operations." << endl;
if (flags & ios_base::dec)
cout << ">> read/write integral values using decimal base format." << endl;
if (flags & ios_base::hex)
cout << ">> read/write integral values using hexadecimal base format." << endl;
if (flags & ios_base::oct)
cout << ">> read/write integral values using octal base format." << endl;
if (flags & ios_base::fixed)
cout << ">> write floating point values in fixed-point notation." << endl;
if (flags & ios_base::scientific)
cout << ">> write floating-point values in scientific notation." << endl;
if (flags & ios_base::internal)
cout << ">> the output is padded to the field width by inserting fill characters at a specified internal point." << endl;
if (flags & ios_base::left)
cout << ">> the output is padded to the field width appending fill characters at the end." << endl;
if (flags & ios_base::right)
cout << ">> the output is padded to the field width by inserting fill characters at the beginning." << endl;
cout << "---" << endl;
}
void iotests()
{
Double_t dval = 13.24;
// default settings printout
cout << "default flags = " << cout.flags() << ":" << endl;
dump_ioflags(cout.flags());
cout << "dval = " << dval << endl;
cout << "++++" << endl << endl;
// printout of the 'floatfield' flags
cout << "ios_base::floatfield :" << ios_base::floatfield << endl;
dump_ioflags(ios_base::floatfield);
cout << "set floatfield flags." << endl;
cout.setf(ios_base::floatfield);
cout << "dval = " << dval << endl;
cout << "++++" << endl << endl;
// unset 'floatfield' flags in order to see if the default is recovered
cout.unsetf(ios::floatfield);
cout << "cout.unsetf(ios::floatfield) -> cout.flags()=" << cout.flags() << endl;
dump_ioflags(cout.flags());
cout << "dval = " << dval << endl;
cout << "++++" << endl << endl;
// set 'fixed' flag
cout.setf(ios_base::fixed);
cout << "cout.setf(ios_base::fixed) -> cout.flags()=" << cout.flags() << endl;
dump_ioflags(cout.flags());
cout << "dval = " << dval << endl;
cout << "++++" << endl << endl;
// unset 'fixed' flag and set 'scientific' instead
cout.unsetf(ios_base::fixed);
cout << "cout.unsetf(ios_base::fixed)" << endl;
cout.setf(ios_base::scientific);
cout << "cout.setf(ios_base::scientific) -> cout.flags()=" << cout.flags() << endl;
dump_ioflags(cout.flags());
cout << "dval = " << dval << endl;
cout << "++++" << endl << endl;
// precision playground according to http://www.cplusplus.com/reference/ios/ios_base/precision/
cout << "precision playground according to http://www.cplusplus.com/reference/ios/ios_base/precision/" << endl;
Double_t f = 3.14159;
cout.unsetf ( ios::floatfield ); // floatfield not set
cout << "cout.unsetf ( ios::floatfield ) -> cout.flags()=" << cout.flags() << endl;
dump_ioflags(cout.flags());
cout.precision(5);
cout << "set cout.precision(5)" << endl;
cout << f << endl;
cout.precision(10);
cout << "set cout.precision(10)" << endl;
cout << f << endl;
cout.setf( ios::fixed, ios::floatfield ); // floatfield set to fixed
cout << "cout.setf( ios::fixed, ios::floatfield ) -> cout.flags()=" << cout.flags() << endl;
dump_ioflags(cout.flags());
cout << f << endl;
cout << "++++" << endl << endl;
}