Compilare: user.cpp: In function ‘int main()’: user.cpp:6:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:11:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld%ld", &n, &m, &x); ^ user.cpp:14:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &temp); ^ user.cpp:18:12: warning: ‘fm’ may be used uninitialized in this function [-Wmaybe-uninitialized] sum -= fm; ^