Structures and Functions

#include <stdio.h>
int add(int, int) ;     //function declaration
int main()
{
//structures declartion
struct addition{
    int a, b;
    int c; 
}sum;
printf("Enter the value of a : ");
scanf("%d",&sum.a);
printf("\nEnter the value of b : ");
scanf("%d",&sum.b);
sum.c = add(sum. a, sum.b);     //passing structure members as arguments to function
printf("\nThe sum of two value are : ");
printf("%d ", sum.c);
return 0;
}
//Function definition
int add(int x, int y)
{
int sum1;
sum1 = x + y;
return(sum1);
}

#include <stdio.h>
//structures declaration
typedef struct {
    int a, b;
    int c;
}sum;
void add(sum) ;     //function declaration with struct type sum
int main()
{
sum s1;
printf("Enter the value of a : ");
scanf("%d",&s1.a);
printf("\nEnter the value of b : ");
scanf("%d",&s1.b);
add(s1);     //passing entire structure as an argument to function
return 0;
}
//Function Definition
void add(sum s)
{
int sum1;
sum1 = s.a + s.b;
printf("\nThe sum of two values are :%d ", sum1);
}

#include <stdio.h>
//Structure declartion
struct employee {
    char name[40];
    int empid;
    int experience;
}emp;
void displaydetails(struct employee*);  //function declaration
int main()
{
struct employee *empptr;   //pointer declaration
empptr = &emp;   //initial
printf("\nEnter the name of the Employee : ");
scanf("%s", empptr->name);
printf("\nEnter the Employee Id : ");
scanf("%d",&empptr->empid);
printf("\nEnter Experience of the Employee : ");
scanf("%d",&empptr->experience);
displaydetails(empptr);
return 0;
}
//Function Definition
void displaydetails(struct employee *empptr)
{
printf("\n---------Details List--------- \n ");
printf("Employee Name : %s",empptr->name);
printf("\nEmployee ID : %d ",empptr->empid);
printf("\nEmployee Experience : %d ",empptr->experience);
}