I do not understand how to call a function. I need to call functions "insert", "remove", and "display." Any help would be much appreciated. Thanks.
Code:
#include <stdio.h>


void insert(float x, int p, int n, int d, int q);
void remove(float x, int p, int n, int d, int q);
void display (float x, int p, int n, int d, int q);




int main(void)
  {   
  int pennies, nickels, dimes, quarters, p,n,d,q;
  pennies=0;
  nickels=0;
  dimes=0;
  quarters=0;
  float x = pennies + 5*nickels + 10*dimes + 25*quarters;
        x =  (float)x/100;




printf( " %d quarters + %d dimes + %d nickels + %d pennies = $%d \n", quarters, dimes, nickels, pennies, x);
printf("insert");
scanf("%d%d%d%d", &p, &n, &d, &q);
pennies += p;
nickels += n;
dimes += d;
quarters += q;
void insert (float x + p + (5*n) + (10*d) + (25*q));
x = float x/100;
printf( " %d quarters + %d dimes + %d nickels + %d pennies = $%d \n", quarters, dimes, nickels, pennies, x);




printf("remove");
scanf("%d%d%d%d", &p, &n, &d, &q);
pennies -= p;
nickels -= n;
dimes -= d;
quarters -= q;
void remove ( float x - p - (5*n) - (10*d) - (25*q));
x = float x/100;
printf( " %d quarters + %d dimes + %d nickels + %d pennies = $%d \n", quarters, dimes, nickels, pennies, x);


 }