Compilare: user.cpp: In function ‘void addb()’: user.cpp:46:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,t; ^ user.cpp:46:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,t; ^ user.cpp:46:13: warning: unused variable ‘t’ [-Wunused-variable] int i,j,t; ^ user.cpp: In function ‘int main()’: user.cpp:97:37: 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:98:39: 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:99:34: 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:102:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:117:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^