Compilare: user.cpp: In function ‘int main()’: user.cpp:8: warning: format ‘%ld’ expects type ‘long int*’, but argument 2 has type ‘int*’ user.cpp:32: warning: format ‘%ld’ expects type ‘long int’, but argument 2 has type ‘int’ user.cpp:6: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:7: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:9: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result /tmp/ccQlDFYz.o: In function `main': user.cpp:(.text+0x6a): warning: the `gets' function is dangerous and should not be used.