Fungsi dengan nilai balik

#include<iostream>

using namespace std;

float jari(float,float,float);

int volum(int,int);

int main()

{ float a,t,c,s,f;

cout<<"Masukkan a       => ";cin>>a;

cout<<"Masukkan t        => ";cin>>t;

cout<<"Masukkan c        => ";cin>>c;

cout<<"Masukkan s        => ";cin>>s;

cout<<"Masukkan f        => ";cin>>f;

cout<<endl;

cout<<endl;

jari(a,t,c);

cout<<"Jari "<<jari(a,t,c)<<endl;

volum(s,f);

cout<<"volum  "<<volum(s,f)<<endl;

}

float jari(float a, float b, float c)

{float d;

d=0.33*a*b*c;

return d;}

int volum(int a, int b)

{int c;

c=a*a*b;

return c;}