Compilare: user.cpp: In function ‘int main()’: user.cpp:83:8: warning: unused variable ‘i’ [-Wunused-variable] int i, x, y; ^ user.cpp:80:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zeap.in", "r", stdin); ^ user.cpp:81:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zeap.out", "w", stdout); ^ user.cpp:91:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c%c\n", &c2, &c3); ^ user.cpp:100:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &x); ^ user.cpp:121:7: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(y != INF) { ^