Compilare: user.cpp: In function ‘void xsort()’: user.cpp:44:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=1,c; ^ user.cpp: In function ‘int main()’: user.cpp:110:17: warning: unused variable ‘j’ [-Wunused-variable] int k1,k2,i,j; ^ user.cpp:111:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&t); ^ user.cpp:115:60: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&v[k2].x,&v[k2].y,&v[k2].z); ^