Compilare: user.cpp: In function ‘int main()’: user.cpp:50:27: warning: for increment expression has no effect [-Wunused-value] for(int i=1; i<=nrEv; i) ^ user.cpp:53:30: warning: unused variable ‘type’ [-Wunused-variable] int coord=ev[i].x.x, type=ev[i].x.y, which=ev[i].y; ^ user.cpp:53:46: warning: unused variable ‘which’ [-Wunused-variable] int coord=ev[i].x.x, type=ev[i].x.y, which=ev[i].y; ^ user.cpp:40:15: warning: unused variable ‘c’ [-Wunused-variable] int a, b, c, d; ^ user.cpp:40:18: warning: unused variable ‘d’ [-Wunused-variable] int a, b, c, d; ^