Write a C Program to example of CALL - BY - VALUE and CALL - BY - ADDRESS (REFERENCE)

#include <stdio.h>
#include <conio.h>
int "call-by-value"(int, int);
void "call-by-address"(int*,int*,int*,int*);
void main()
{
 int a=6,b=10,sum,mul;
 clrscr();
 printf("\n&a= %d\n&B= %d\n&SUM= %d\n&MUL= %d",&a,&b,&sum,&mul);
 sum= "call-by-value" (a,b);
 printf("\n\n%d+%d=%d",a,b,sum);
 printf("\nA= %d, B= %d",a,b);
 "call-by-address"(&a,&b,&sum,&mul);
 printf("\n After swapping:\nA= %d, B= %d,\nSUM =%d,\nMUL= %d",sum,mul,a,b);
}
int "call-by-value" (int x, int y)
{
 int z;
 x=65;
 z=x+y;
 return(z);
}
void "call-by-adderss" (int*m,int*n,int*q,int*r)
{
 int p;
 *m=65;
 p=*m;
 *m=*n;
 *n=*p;
 *q=*m+*n;
 *r=*m**n;
}