Compilare: user.cpp: In function ‘int main()’: user.cpp:9:15: warning: unused variable ‘y’ [-Wunused-variable] int n, x, y, z, t, i, s, j, p, ok, k; ^ user.cpp:9:18: warning: unused variable ‘z’ [-Wunused-variable] int n, x, y, z, t, i, s, j, p, ok, k; ^ user.cpp:9:40: warning: unused variable ‘k’ [-Wunused-variable] int n, x, y, z, t, i, s, j, p, ok, k; ^ user.cpp:11:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^