Compilare: user.cpp: In function ‘void solveline(int, int, int)’: user.cpp:16:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,t; ^ user.cpp: In function ‘int main()’: user.cpp:45:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp:43:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri3.in","r",stdin); ^ user.cpp:44:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri3.out","w",stdout); ^ user.cpp:46:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&n,&m,&k); ^ user.cpp:48:66: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d",&l1[i],&c1[i],&l2[i],&c2[i],&p[i]); ^