Compilare: main.c: In function 'main': main.c:25:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("reuniune.in","r",stdin),freopen("reuniune.out","w",stdout),scanf("%d%d%d%d",&a.x,&a.y,&a.u,&a.v), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:25:38: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("reuniune.in","r",stdin),freopen("reuniune.out","w",stdout),scanf("%d%d%d%d",&a.x,&a.y,&a.u,&a.v), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:25:73: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("reuniune.in","r",stdin),freopen("reuniune.out","w",stdout),scanf("%d%d%d%d",&a.x,&a.y,&a.u,&a.v), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:26:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&b.x,&b.y,&b.u,&b.v),scanf("%d%d%d%d",&c.x,&c.y,&c.u,&c.v),x=R(a,b),y=R(a,c),z=R(b,c),t=R(x,c); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:26:43: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&b.x,&b.y,&b.u,&b.v),scanf("%d%d%d%d",&c.x,&c.y,&c.u,&c.v),x=R(a,b),y=R(a,c),z=R(b,c),t=R(x,c); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~