Compilare: main.cpp: In function 'int cmmdc1(int, int)': main.cpp:23:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int cmmdc2(int, int)': main.cpp:41:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:45:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("numinum.in" , "r" , stdin); ^ main.cpp:46:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("numinum.out" , "w" , stdout); ^ main.cpp:48:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &n); ^ main.cpp:51:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d" , &a , &b , &c , &d); ^