Simple function as argument.

Simple function as argument.c

//Simple function as argument.
// [email protected]
#include<stdio.h>

double f(double x);
double sum_square(double (*)(double x), int lower, int upper) ;

int main(){
   printf("%lf\n",sum_square(f,1,10));
	return 0;
}

double f(double x){ return 1.0 / x; }

double sum_square(double f(double x), int lower, int upper){
   double sum=0.0 ;
   int k=0;
   for(k=lower;k<=upper;++k){
      sum += (*f)(k) * (*f)(k) ;
   }
   return sum ;
}