Compilare: user.cpp: In function ‘int main()’: user.cpp:33:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &p, &n, &v); ^ user.cpp:163:22: warning: ‘l21’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l11<<' '<<l21<<' '<<k1; ^ user.cpp:163:12: warning: ‘l11’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l11<<' '<<l21<<' '<<k1; ^ user.cpp:54:10: warning: ‘k1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((k1-1)%2==0) ^