2.) With argument and No return

In this type of function argument and parameter must be specified and function doesn't return any value so the datatype of function must be "void"
syntax:-
void function name(datatype arg 1,datatype arg 2)
{
statement;
.........
..........
}
example:-write  a program to input 3 number and calculate sum using function with argument and no return.
         

Ex:-
void main()
{
int a,b,c;
void sum(int,int,int);
printf("\n enter three number");
scanf("%d%d%d",&a,&b,&c);
sum(a,b,c);
getch();
}
void sum(int x,int y,int z)
{
int add;
add=x+y+z;
printf("\n sum of three number=%d",add);
}