Compilare: user.c: In function ‘BFS’: user.c:56:15: warning: unused variable ‘j’ [-Wunused-variable] int L=1,i,j,cost[n],coada[n]; ^ user.c: In function ‘main’: user.c:83:19: warning: unused variable ‘j’ [-Wunused-variable] int n,m,x,y,i,j,nod; ^ user.c: In function ‘edges_to_matrix’: user.c:40:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d", &n, &m); ^ user.c:43:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d", &x, &y); ^ user.c: In function ‘main’: user.c:85:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d", &n, &m, &nod); ^ user.c:94:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d", &x ,&y); ^