Compilare: main.cpp: In function 'int main()': main.cpp:145:19: warning: unused variable 'colinrob1' [-Wunused-variable] int x, y, i, j, colinrob1, colinrob2; ^~~~~~~~~ main.cpp:145:30: warning: unused variable 'colinrob2' [-Wunused-variable] int x, y, i, j, colinrob1, colinrob2; ^~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:19:29: 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); ^