Eroare de compilare: user.c: In function ‘main’: user.c:27:13: error: ‘e’ undeclared (first use in this function) for(e+=g[n+1],l=n+1;l;l=u[l]) ^ user.c:27:13: note: each undeclared identifier is reported only once for each function it appears in user.c:27:22: warning: left-hand operand of comma expression has no effect [-Wunused-value] for(e+=g[n+1],l=n+1;l;l=u[l]) ^ user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cc.in","r",stdin),freopen("cc.out","w",stdout),scanf("%d",&n); ^ user.c:4:39: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cc.in","r",stdin),freopen("cc.out","w",stdout),scanf("%d",&n); ^ user.c:4:66: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("cc.in","r",stdin),freopen("cc.out","w",stdout),scanf("%d",&n); ^ user.c:7:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k),v[i][n+j+1]=k,v[n+j+1][i]=-k,c[i][n+j+1]=1; ^