Compilare: user.cpp: In function ‘void Add(char*, char*)’: user.cpp:64:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[a[0]] = add % 10; ^ user.cpp: In function ‘void Divide(char*, int)’: user.cpp:76:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (a[0] && !a[a[0]]) ^ user.cpp: In function ‘void Multiply(char*, int)’: user.cpp:104:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] a[a[0]] = add % 10; ^ user.cpp: In function ‘char Advance()’: user.cpp:27:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, 1, SIZE, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:115:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rute.in", "r", stdin); ^ user.cpp:116:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rute.out", "w", stdout); ^ user.cpp:118:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^