mencari konversi suhu

#include <iostream>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

/*cara menghitung suhu*/

using namespace std;

int main(int argc, char** argv) {

{              int c;

                float r,f,k;

                cout<<"masukkan suhu c :";

                cin>>c;

                                r=4/5*c;

                                r=4/(float)5*c;

                                f=(9/5*c)+32;

                                k=c+273;

                                cout<<"nilai suhu c= "<<"\t r= "<<r<<"\t f= \t k= "<<f;

                }

                return 0;

}