Implementation of program to search a character in a string using pointer.

Pointer is variable which is able to hold address of another appropriate data type variable. In C++ when a string is assigned to character array then array name indicates address of it's zeroth location. So if we declare a character pointer variable like char * p; and a character array like char str[20]; Then the statement p=str causes pointer p to hold the address of zeroth location character of string str. This concept is used in this program.

Below is the program to search required character in a string using pointer.
Please add iosream.h and conio.h header files before declaration of main function.

//PROGRAM TO FIND REQUIRED CHARACTER IN THE STRING USING POINTER.
#include
#include
void main(void)
{
char str[20],*p,find;
int k=0,len,c=0,d=0;
clrscr();
cout<<"Enter any string\n";
cin>>str;
cout<<"\nEnter the character to find out\n";
cin>>find;
p=str;
while(*p!='\0')
{
c++;
p++;
}
len=c;

clrscr();
cout<<"Given string is "< cout<<"length of given string is "< cout<<"required character "< for(p=str;p {
d++;
if(*p==find)
{
k=1;
cout<<"\nat "< }
}
if(k==0)
{
cout<<"\nRequired character is not found in the given string ";
}
getch();
}
In above program length of given string is also calculated by using pointer to string concept instead of using ready made strlen().