/*метод простой итерации*/
 X=0;
 Y=1;
 x=0;
 y=0;
 do
 {
  x=0.7-cos(Y-1);
  y=1-0.5*sin(X);
  X+=x;
  Y+=y;
  if (abs(x)>abs(y))
   y=x;
  fprintf(output, "X= %f Y= %f y= %f\n",X,Y,y);
 }while (abs(y)>eps);

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