Compilare: main.cpp: In function 'char nextch()': main.cpp:24:29: 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,BUFF,stdin); ^ main.cpp: In function 'int main()': main.cpp:79:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "map.in", "r", stdin ); ^ main.cpp:80:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "map.out", "w", stdout ); ^