Compilare: main.cpp: In function 'void percolate(int)': main.cpp:49:9: warning: unused variable 'fat' [-Wunused-variable] int fat; ^~~ main.cpp: In function 'void read()': main.cpp:15:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&n,&m); ^ main.cpp:17:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d %d",&a,&b,&c); ^