Compilare: user.cpp: In function ‘int main()’: user.cpp:173:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &edges); ^ user.cpp:177:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &i, &j); ^ user.cpp:229:70: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d\n", getNodeFromConex[k], getNodeFromConex[j]); ^