Compilare: user.cpp: In function ‘void addb()’: user.cpp:43:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,t; ^ user.cpp:43:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,t; ^ user.cpp:43:13: warning: unused variable ‘t’ [-Wunused-variable] int i,j,t; ^ user.cpp: In function ‘int main()’: user.cpp:109:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri3.in","r",stdin); ^ user.cpp:110:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri3.out","w",stdout); ^ user.cpp:111:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&m,&k,&q); ^ user.cpp:114:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:129:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^