Compilare: main.cpp: In function 'int main()': main.cpp:42:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^ main.cpp:45:90: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d%d",&mch[i].first,&mch[i].second,&ec[i].a,&ec[i].b,&ec[i].c); ^