Compilare: main.cpp: In function 'int main()': main.cpp:131:35: warning: unused variable 'c' [-Wunused-variable] int n, m, culmax(0), i, j, x, c, y, tip, Max; ^ main.cpp: In member function 'char InParser::read_ch()': main.cpp:40:29: 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); ^