Compilare: user.cpp: In function ‘int main()’: user.cpp:58:23: warning: unused variable ‘ind’ [-Wunused-variable] { int l,i,xmin,ymin,ind,s=0,ymax; ^~~ user.cpp:61:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&l); ^ user.cpp:62:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&v2[1].x,&v2[1].y); ^ user.cpp:66:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&v2[i].x,&v2[i].y); ^ user.cpp:58:13: warning: ‘xmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] { int l,i,xmin,ymin,ind,s=0,ymax; ^~~~