Optimization: Bound Phase Method
Bound Phase Method Algorithm in C
#include<stdio.h>#include<math.h>
double myFun(double x);
int main()
{
double xw,a,b,fa,fb,fxw,D,y ;
int k,o,z;
float x[100],fx[100];
k = 0;
start:
printf("Enter x[0]:");
scanf("%lf",&xw);
printf("Enter D:");
scanf("%lf",&D);
a = xw + D;
b = xw - D;
fxw = myFun(xw);
printf("\nf(x0) = %.2lf",fxw);
fa = myFun(a);
printf("\nf(x0 + D) = %.2lf",fa);
fb= myFun(b);
printf("\nf(x0 - D) = %.2lf",fb);
printf("\nx[%d] = %.2lf",k,xw);
x[0] = xw;
fx[k] = fxw;
o = k+1;
if (fb <= fxw && fxw <= fa)
{
D = -D;
goto jump1;
}
else if (fb >= fxw && fxw >= fa)
{
goto jump1;
}
else
{
printf("\n\n\tChange Initial Guess...\n\n");
goto start;
}
jump1:
x[o] = (x[k] + (pow(2,k) * D));
printf("\n\nx[%d] = %.3f",o,x[o]);
fx[o] = myFun(x[o]);
printf("\nfx[%d] = %.3f",o,fx[o]);
if (fx[o] < fxw)
{
if (fx[o] < fx[k])
{
k = k + 1;
o = o + 1;
goto jump1;
}
else
{
printf("\nBounded range: (x(%d),x(%d))",k-1,k+1);
printf("\nk = %d",k);
}
}
else
{
goto end;
}
end:
return 0;
}
double myFun(double x) // function definition
{
double y;
y = ((x*x)+(54/x));
return y; // return statement
}
Output:
 |
| Bound Phase Method Optimization Algorithm |
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