#include<stdio.h>
#include<math.h>
int main()
{
float x[10],y[10], temp, ans[10], sum, point;
int i,j,k=0,num;
printf("Enter your points : ");
scanf("%d",&num);
for(i=0; i<num; i++)
{
printf("x%d is: ", i);
scanf("%f",&x[i]);
printf("y%d is: ", i);
scanf("%f",&y[i]);
}
printf("Enter your interpolation number: ");
scanf("%f",&point);
for(i=0;i<num;i++)
{
temp = 1;
k = i;
for(j=0;j<num;j++)
{
if(k==j)
{
continue;
}
else
{
temp = temp * ((point-x[j])/(x[k]-x[j]));
}
}
ans[i]=y[i]*temp;
}
for(i=0;i<num;i++)
{
sum = sum + ans[i];
}
printf("f(%.1f) = %f ", point, sum);
return 0;
}
#include<math.h>
int main()
{
float x[10],y[10], temp, ans[10], sum, point;
int i,j,k=0,num;
printf("Enter your points : ");
scanf("%d",&num);
for(i=0; i<num; i++)
{
printf("x%d is: ", i);
scanf("%f",&x[i]);
printf("y%d is: ", i);
scanf("%f",&y[i]);
}
printf("Enter your interpolation number: ");
scanf("%f",&point);
for(i=0;i<num;i++)
{
temp = 1;
k = i;
for(j=0;j<num;j++)
{
if(k==j)
{
continue;
}
else
{
temp = temp * ((point-x[j])/(x[k]-x[j]));
}
}
ans[i]=y[i]*temp;
}
for(i=0;i<num;i++)
{
sum = sum + ans[i];
}
printf("f(%.1f) = %f ", point, sum);
return 0;
}
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