#include <stdio.h>

#define PI 3.14159
#define SNOW_DEN 0.1

double Sphere_Volume( double radius);
double Sphere_Mass (double den, double volume);

int main() {
    int radius_1, radius_2, radius_3;
    double total_volume;
    double total_mass;


    printf("What is the radii of the head, body and leg of the snowman?\n");
    scanf("%lf%lf%lf", &radius_1, &radius_2, &radius_3);
    
    total_volume= Sphere_Volume(radius_1)+ Sphere_Volume(radius_2) + Sphere_Volume(radius_3);
    total_mass= Sphere_Mass(SNOW_DEN, total_volume);
    
    printf("The total Mass in grams is %lf.\n", total_mass);
    
    system("PAUSE");
    return 0;
}


double Sphere_Volume( double radius){
       return 4*PI/3*radius*radius*radius;
}
       
double Sphere_Mass (double den, double volume){
       return  SNOW_DEN*volume;
}

snowman.c:16: warning: format ‘%lf’ expects type ‘double *’, but argument 2 has type ‘int *’
snowman.c:16: warning: format ‘%lf’ expects type ‘double *’, but argument 3 has type ‘int *’
snowman.c:16: warning: format ‘%lf’ expects type ‘double *’, but argument 4 has type ‘int *’

gcc -Wall -pedantic -std=c99 -o snowman snowman.c

snowman.c:23: warning: implicit declaration of function ‘system’