Compilare: main.cpp: In function 'void sol(std::pair<std::pair<double, double>, std::pair<double, double> >, std::pair<std::pair<double, double>, std::pair<double, double> >)': main.cpp:86:49: warning: unused variable 'rz' [-Wunused-variable] double aa=0,ab=0,ac=0,ba=0,bb=0,bc=0,rx=0,ry=0,rz=0,t=0; ^~ main.cpp: In function 'pdd pct(pdd, pdd, double, double, double)': main.cpp:63:1: warning: control reaches end of non-void function [-Wreturn-type] } ^