Compilare: user.cpp: In function ‘void update(st*, int, int, int, int, int)’: user.cpp:131:9: warning: unused variable ‘ak’ [-Wunused-variable] int ak = 47; ^ user.cpp: In function ‘void read()’: user.cpp:26:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp: In function ‘void write()’: user.cpp:182:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &ty, &a, &b, &p); ^