Something

#include <stdlib.h>#include <stdio.h>void add(int,char);void print();struct x{        int i;        char c;        struct x * next;};struct x * head = NULL;int main(void){        add(1,'a');        add(2,'b');        add(3,'c');        add(4,'d');        print();        return 0;}void add(int i, char c){        struct x * current = head;        if( head == NULL )        {                head = malloc(  sizeof( struct x)  );                head->i = i;                head->c = c;                head->next = NULL;        }        else        {                for(;current->next != NULL; current=current->next);                current->next=malloc(sizeof(struct x));                current = current->next;                current->i = i;                current->c = c;                current->next = NULL;        }}void print(){        struct x * current = head;        if( current == NULL ) return;        for(;current != NULL; current=current->next )        {                printf("%d %c\n", current->i, current->c);        }}