Compilare: user.c:48:5: warning: first argument of ‘main’ should be ‘int’ [-Wmain] int main(int *argc, char *argv[]) { ^ user.c: In function ‘main’: user.c:61:25: warning: unused variable ‘j’ [-Wunused-variable] int j; ^ user.c: In function ‘readInput’: user.c:80:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &numberOfVertices, &numberOfEdges); ^ user.c:85:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &firstVertexInEdge, &secondVertexInEdge); ^