Compilare: main.cpp: In function 'int main()': main.cpp:33:13: warning: variable 'st' set but not used [-Wunused-but-set-variable] int n, i, st, j, x, y; ^~ main.cpp:33:17: warning: unused variable 'j' [-Wunused-variable] int n, i, st, j, x, y; ^ main.cpp:33:23: warning: unused variable 'y' [-Wunused-variable] int n, i, st, j, x, y; ^ main.cpp:38:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d ", &n ); ^ main.cpp:47:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &x ); ^