Compilare: user.cpp: In function ‘int main()’: user.cpp:25: warning: format ‘%d’ expects type ‘int*’, but argument 2 has type ‘int’ user.cpp:25: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘int’ user.cpp:23: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int legendre(int, int)’: user.cpp:8: warning: ‘s’ may be used uninitialized in this function