Compilare: main.cpp: In function 'int main()': main.cpp:24:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in","r",stdin); ^ main.cpp:25:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out","w",stdout); ^ main.cpp:125:50: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pozi<<" "<<pozj<<endl<<(char)(r+'a'-1); ~~~~~~^~~ main.cpp:125:26: warning: 'pozj' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pozi<<" "<<pozj<<endl<<(char)(r+'a'-1); ^~~~ main.cpp:125:21: warning: 'pozi' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<pozi<<" "<<pozj<<endl<<(char)(r+'a'-1); ^~~