Compilare: main.cpp: In function 'int main()': main.cpp:12:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ main.cpp:16:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&j,&e); ^ main.cpp:59:25: warning: 'poz2' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"%d %d\n",poz2,a[poz2][v[poz2]]); ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:81:21: warning: 'poz1' may be used uninitialized in this function [-Wmaybe-uninitialized] if(ultim==poz2) ^~