CareerCup

Here is the code for the same :

#include<stdio.h>
#include<string.h>

void StringCopy(char[], char[]);
int main()
{
char sample[] = " Hello World";
char sampleCopy[20];
int i =0,j=0;
printf("\n The original string is :" );
for(i=0;i<strlen(sample);i++)
{
printf("%c",sample[i]);
}
StringCopy(sample,sampleCopy);

printf("\n The copied string is :");
for(j=0;j<strlen(sampleCopy);j++)
{
printf("%c",sampleCopy[j]);
}
return 0;
}

void StringCopy(char *str1, char *str2)
{

while(*str1 != '\0')
{
*str2++ = *str1++;
}
*str2 = '\0';

}

Is it code for strncpy or strcpy?

void strncpy(char*p,char*s,int n) {

for(int i=0;i<n;i++)
*(p+i)=(s+i);
}

From unknown source:

char * 
strncpy( char *dst, const char *src, size_t n )
{
   char *d = dst;
   
   if( n )
   {
      do
      {
          if((*d++ = *src++) == 0)
          {
              while( --n )
                 *d++ = 0;

              break;
          }
      } while ( --n );
   }  /* endof if( n ) */

   return dst;
}

while(*p++=*s++);