caravane.cpp: In function 'void ComputeDistances()': caravane.cpp:61: warning: unused variable 'tata' caravane.cpp: In function 'void Solve()': caravane.cpp:93: warning: unused variable 'p' caravane.cpp:96: warning: unused variable 'start' caravane.cpp:96: warning: unused variable 'stop' caravane.cpp:131: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result caravane.cpp: In function 'void Readdata()': caravane.cpp:157: warning: format '%d' expects type 'int*', but argument 4 has type 'long int*' caravane.cpp:153: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result caravane.cpp:154: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result caravane.cpp:157: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result