cuvinte.cpp: In function 'int main()': cuvinte.cpp:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cuvinte.cpp:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cuvinte.cpp: In function 'void read(int&)': cuvinte.cpp:70: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result cuvinte.cpp:76: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result cuvinte.cpp: In function 'int fillHole(int, int)': cuvinte.cpp:26: warning: control reaches end of non-void function