Compilare: user.cpp: In function ‘int main()’: user.cpp:46:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&n,&xi,&xj); ^ user.cpp: In function ‘void pav(int, int, int, int, int)’: user.cpp:28:22: warning: ‘i0’ may be used uninitialized in this function [-Wmaybe-uninitialized] xxg[i]=xg; ^