Compilare: main.cpp: In function 'int main()': main.cpp:37:15: warning: unused variable 'c' [-Wunused-variable] int t,a,b,c,d,x,y; ^ main.cpp:37:19: warning: unused variable 'x' [-Wunused-variable] int t,a,b,c,d,x,y; ^ main.cpp:37:21: warning: unused variable 'y' [-Wunused-variable] int t,a,b,c,d,x,y; ^ main.cpp:35:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.in","r",stdin); ^ main.cpp:36:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.out","w",stdout); ^ main.cpp:38:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ main.cpp:40:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^