Compilare: user.cpp: In function ‘void read()’: user.cpp:97:68: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &dest, &height[1], &height[2], &height[3]); ^ user.cpp:104:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &values[t][i]); ^