Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: unused variable ‘s’ [-Wunused-variable] int j=1,s, i, p ,n; ^ user.cpp:9:19: warning: unused variable ‘p’ [-Wunused-variable] int j=1,s, i, p ,n; ^ user.cpp:7:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xspe.in", "r", stdin); ^ user.cpp:8:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("xspe.out", "w", stdout); ^