Compilare: user.cpp: In function ‘int main()’: user.cpp:64: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp:26: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:6: warning: ‘r’ is used uninitialized in this function user.cpp: In function ‘int main()’: user.cpp:6: warning: ‘r’ is used uninitialized in this function user.cpp:5: note: ‘r’ was declared here