Compilare: main.cpp: In function 'int main()': main.cpp:13:9: warning: unused variable 'x' [-Wunused-variable] int x,y,z,n; ^ main.cpp:13:11: warning: unused variable 'y' [-Wunused-variable] int x,y,z,n; ^ main.cpp:13:13: warning: unused variable 'z' [-Wunused-variable] int x,y,z,n; ^ main.cpp:11:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("curcubeu.in","r",stdin); ^ main.cpp:12:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("curcubeu.out","w",stdout); ^ main.cpp:14:43: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&a[1],&b[1],&c[1]); ^