Compilare: user.cpp: In function ‘int main()’: user.cpp:67:37: warning: unused variable ‘ct’ [-Wunused-variable] int s, i1, m, l1, l2, l3, l4, ct, f, y1; ^ user.cpp:67:41: warning: unused variable ‘f’ [-Wunused-variable] int s, i1, m, l1, l2, l3, l4, ct, f, y1; ^ user.cpp:72:37: 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:203:23: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k; ^ user.cpp:203:12: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout <<l1<< ' ' <<l2<< ' ' <<k; ^ user.cpp:94:9: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((k-1)%2==0) ^