Compilare: user.cpp: In function ‘int main()’: user.cpp:24:9: warning: unused variable ‘n’ [-Wunused-variable] int n, x, y, i, j, t, s, ok, qwe, nr1, nr2; ^ user.cpp:24:12: warning: unused variable ‘x’ [-Wunused-variable] int n, x, y, i, j, t, s, ok, qwe, nr1, nr2; ^ user.cpp:24:15: warning: unused variable ‘y’ [-Wunused-variable] int n, x, y, i, j, t, s, ok, qwe, nr1, nr2; ^ user.cpp:24:27: warning: unused variable ‘s’ [-Wunused-variable] int n, x, y, i, j, t, s, ok, qwe, nr1, nr2; ^ user.cpp:21:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.in","r",stdin); ^ user.cpp:22:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pm.out","w",stdout); ^ user.cpp:26:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&nr1,&nr2); ^