Compilare: main.cpp: In function 'int main()': main.cpp:70:19: warning: unused variable 'dir' [-Wunused-variable] int n, m, i, j, dir ; ^~~ main.cpp:72:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d\n", &n, &m ) ; ^ main.cpp:75:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%c", &c ) ; ^ main.cpp:78:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%c", &c ) ; ^