c++ - Path Include in Make/options file -

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i have simple problem, think, can't find solution. i've included "mathcalls.h" file 1 of projects since need use pow(double, double) method of it. therefore i've added filepath to...

... make/options file:

-iusr/include/i386-linux-gnu/bits

... include file of ide (qt creator):

/usr/include/i386-linux-gnu/bits

for include tried 

#include "mathcalls.h" #include <mathcalls.h>

but when building project error:

/home/user/solvernew/multiphaseeulerfoamnew.c:46: error: mathcalls.h: no such file or directory

when looking @ this, seems compiler searching in project directory although have added path file? please note in "usr/include/i386-linux-gnu/bits" root has full access, others authorised "access files".

how can solve problem professionally?

the professional way gain access double pow(double x, double y) is:

#include <cmath>

or, @ pinch:

#include <math.h>

then there no issues grovelling around sub-directories under /usr/include.


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