Compilare: user.cpp: In function ‘void read()’: user.cpp:11:9: warning: unused variable ‘d’ [-Wunused-variable] int d; ^ user.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:16:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &dp[i][j]); ^