Eroare de compilare: user.c: In function ‘main’: user.c:7:46: error: ‘r’ undeclared (first use in this function) scanf("%d",&e),y=b[j]>c[j-1]?b[j]:c[j-1],e=r-y,s=c[j]=y>e?y:e; ^ user.c:7:46: note: each undeclared identifier is reported only once for each function it appears in user.c:7:49: warning: left-hand operand of comma expression has no effect [-Wunused-value] scanf("%d",&e),y=b[j]>c[j-1]?b[j]:c[j-1],e=r-y,s=c[j]=y>e?y:e; ^ user.c:4:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in","r",stdin),freopen("joc.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:4:37: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in","r",stdin),freopen("joc.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:4:65: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("joc.in","r",stdin),freopen("joc.out","w",stdout),scanf("%d%d",&n,&m); ^