Compilare: user.cpp: In function ‘int main()’: user.cpp:36:9: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] int x, y; ^ user.cpp:42:9: warning: unused variable ‘y0’ [-Wunused-variable] int y0; ^ user.cpp: In function ‘int iden(int)’: user.cpp:29:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:38:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f0, "%d%d%d", &p, &n, &v); ^ user.cpp:223:27: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k0; ^ user.cpp:223:16: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k0; ^ user.cpp:223:40: warning: ‘k0’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k0; ^ user.cpp:142:19: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(k%2==0) ^