Compilare: main.cpp: In function 'int main()': main.cpp:61:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cablaj.out", "w", stdout); ^ main.cpp: In member function 'char InParser::read_ch()': main.cpp:14:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ main.cpp: In function 'int main()': main.cpp:52:78: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] return sqrt((this->x - other.x) * (this->x - other.x) + (this->y - other.y) * (this->y - other.y)); ~~~~~~^ main.cpp:74:9: note: 'j' was declared here int j; ^