Compilare: main.cpp: In function 'int main()': main.cpp:20:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ main.cpp:22:59: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&oras[i].first,&oras[i].second); ^ main.cpp:37:98: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] dist= 1.0 * sqrt (patrat (oras[nod].first-oras[vecin].first) + patrat (oras[nod].second-oras[vecin].second)); ~~~~~~~~~~^~~~~~