Fourth Order Runge-Kutta Method For Differential Equation

 #include<stdio.h>  
 #include<math.h>  
 float funct(float,float);  
 void main()  
 {  
      float y0,yprime,k1,k2,k3,k4;  
      float h,x,iter,x0;  
      printf("\n\t\t\tFourth Order Runge-Kutta Method To Solve Differential Equation");  
      printf("\n=========================================================================================================================\n");  
      printf("\t\t\tEnter the value of h(the interval) ");  
      scanf("%f",&h);  
      printf("\n=========================================================================================================================\n");  
      printf("\t\t\tEnter the value of X(for which you need value of y) ");  
      scanf("%f",&x);  
      printf("\n=========================================================================================================================\n");  
      printf("\t\t\tEnter the intital value y0 ");  
      scanf("%f",&y0);  
      printf("\n=========================================================================================================================\n");  
      printf("\t\t\tEnter the intital value x0 ");  
      scanf("%f",&x0);  
      for(iter=x0;iter<=x;iter=iter + h)  
      {  
           k1=funct(iter,y0);  
           k2=funct(iter+(h/2),y0+(k1*h)/2);  
           k3=funct(iter+((h/2)),y0+(k2*h)/2);  
           k4=funct(iter+h,y0+(k3*h));  
           yprime=y0+((h/6)*(k1+2*(k2+k3)+k4));  
           printf("\n\tValue of X=%f then Value of Y=%f ",iter,y0);  
           y0=yprime;  
      }  
      getchar();  
 }  
 float funct(float x,float y)  
 {  
      return ((x-y)/(x+y));  
 }