Compilare: main.c: In function 'dfs': main.c:20:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.c: In function 'main': main.c:93:13: warning: unused variable 'x' [-Wunused-variable] int n,m,x,n1,n2; ^ main.c: In function 'create': main.c:44:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:95:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:100:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n1,&n2); ^~~~~~~~~~~~~~~~~~~~~~~~~