Compilare: user.cpp: In function ‘int main()’: user.cpp:46:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reuniune.in","r",stdin); ^ user.cpp:47:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("reuniune.out","w",stdout); ^ user.cpp:48:137: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d\n%d %d %d %d\n%d %d %d %d\n",&d1.xi,&d1.yi,&d1.xf,&d1.yf,&d2.xi,&d2.yi,&d2.xf,&d2.yf,&d3.xi,&d3.yi,&d3.xf,&d3.yf); ^