Compilare: user.c:26:5: warning: second argument of ‘main’ should be ‘char **’ [-Wmain] int main(int argc, int *argv[]) { ^ user.c: In function ‘readInput’: user.c:55:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &numberOfVertices, &numberOfEdges); ^ user.c:58:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &firstVertexInEdge, &secondVertexInEdge); ^