Compilare: user.cpp: In function ‘int main()’: user.cpp:20:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.cpp:23:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&x); ^ user.cpp:63:44: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out,"%d %d %d",mx[sol].x,mx[sol].y,r); ^ user.cpp:19:16: warning: ‘to’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n,from,to,maxim = -1,x,nsol = 0,secvmax = 0,sol; ^ user.cpp:49:32: warning: ‘from’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(to - from > secvmax || to == from) ^