TO COPY THE CONTENTS OF ONE STRING TO ANOTHER STRING

This is the simple implementation of the "Copy" function using the pointers. This program copies the content of one string to another.

Logic : The program asks the user to input the string to copy and stores using the pointer str1. The inner function "stcpy" takes 2 string pointers as arguments. By keeping the length as the reference, it traces till EOF , for each i of this iteration it copies the i-th  letter to the destination string, i.e str2. After the EOL, it puts a NULL to the second line. That gives the duplicated string of the entered.

This function copies the string using the pointer, where earlier program copies the string directly.

#include<stdio.h>
#include<conio.h>
void stcpy(char *str1, char *str2);
void main()
{
         char *str1, *str2;
         clrscr();
         printf("\n\n\t ENTER A STRING...: ");
         gets(str1);
         stcpy(str1,str2);
         printf("\n\t THE COPIED STRING IS...: ");
         puts(str2);
         getch();
}
void stcpy(char *str1, char *str2)
{
         int i, len = 0;
         while(*(str1+len)!='\0')
         len++;
         for(i=0;i<len;i++)
         *(str2+i) = *(str1+i);
         *(str2+i) = '\0';
}

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