Compilare: user.cpp: In function ‘int main()’: user.cpp:29:24: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> mineral + 1; ^ user.cpp:17:16: warning: unused variable ‘o’ [-Wunused-variable] char C[6], o; ^ user.cpp:14:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("minerale.in", "r", stdin); ^ user.cpp:15:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("minerale.out", "w", stdout); ^ user.cpp:19:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (C, 5, stdin); ^ user.cpp:22:28: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (C, 6, stdin); ^