Compilare: user.cpp: In function ‘int main()’: user.cpp:32:9: warning: unused variable ‘y0’ [-Wunused-variable] int y0; ^ user.cpp:28:37: 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:213:27: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k0; ^ user.cpp:213:16: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k0; ^ user.cpp:213:40: warning: ‘k0’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k0; ^ user.cpp:132:19: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(k%2==0) ^