Compilare: user.cpp: In function ‘bool BellManFord()’: user.cpp:71:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void Read()’: user.cpp:18:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &n, &m); ^ user.cpp:21:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &x, &y, &c); ^