Compilare: user.cpp: In function ‘int main()’: user.cpp:62:9: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,t; double sol=0,s1,s2,r1=0,r2=0; ^ user.cpp:62:11: warning: unused variable ‘t’ [-Wunused-variable] { int i,j,t; double sol=0,s1,s2,r1=0,r2=0; ^ user.cpp:62:21: warning: unused variable ‘sol’ [-Wunused-variable] { int i,j,t; double sol=0,s1,s2,r1=0,r2=0; ^ user.cpp:62:27: warning: unused variable ‘s1’ [-Wunused-variable] { int i,j,t; double sol=0,s1,s2,r1=0,r2=0; ^ user.cpp:62:30: warning: unused variable ‘s2’ [-Wunused-variable] { int i,j,t; double sol=0,s1,s2,r1=0,r2=0; ^