copy string in c 2b 2b

1#include <stdio.h>
2#include <stdlib.h>
3#include <string.h>
4#define sg struct gammal
5struct gammal {
6    char name[20];
7    int payment;
8    struct gammal *next;
9};
10void add (sg *g){
11    char name[20];
12    int payment;
13    printf("Enter Name: ");
14    scanf("%s",name);
15    printf("Enter Payment: ");
16    scanf("%d",&payment);
17    if(g->payment == -1){
18        strcpy(g->name,name);
19        g->payment = payment;
20        g->next = NULL;
21    }
22    else {
23        while(g->next != NULL)
24            g = g->next;
25        g->next = (sg*)malloc(sizeof(sg));
26        g = g->next;
27        strcpy( g->name,name);
28        g->payment = payment;
29        g->next = NULL;
30    }
31}
32void show (sg *g){
33    while ( g != NULL){
34        printf("---------");
35        printf("%s ",g->name);
36        printf("%d ",g->payment);
37        g = g->next;
38    }
39}
40int main()
41{
42    sg *g =(sg*)malloc(sizeof(sg));
43    g->payment = -1;
44    add(g);
45    add(g);
46    show(g);
47}

1//use '=' to copy string
2string s1={"Hello"};
3string s2;
4s2=s1;	//now s2 will have a copu s1