Form() and integer division remainder

ROOT
1

Hello,

I am trying to create a TString of the following format:

double mass = 0.140;
TString myString = Form("FirstPionMomentum/%f * (event % 2 == 0) + SecondPionMomentum/%f * (event % 2 == 1)", mass, mass);

However, since the % symbol enters here as both Form format specifier and the integer division remainder operator, I get the following warning:

development/test.C:5:59: warning: invalid conversion specifier ' ' [-Wformat-invalid-specifier]
TString myString = Form("FirstPionMomentum/%f * (event % 2 == 0) + SecondPionMomentum/%f * (event % 2 == 1)", mass, mass);
                                                       ~~~^
development/test.C:5:102: warning: invalid conversion specifier ' ' [-Wformat-invalid-specifier]
TString myString = Form("FirstPionMomentum/%f * (event % 2 == 0) + SecondPionMomentum/%f * (event % 2 == 1)", mass, mass);
                                                                                                  ~~~^

However, the string itself seems to be created correctly:
FirstPionMomentum/0.140000 * (event % 2 == 0) + SecondPionMomentum/0.140000 * (event % 2 == 1)

Is there a simple workaround to prevent this warning?

ROOT Version: 6.26/14
Platform: linuxx8664gcc
Compiler: g++ (GCC) 14.1.0

2

event %% 2

1 Like