std meaning c++ code example
Example 1: why to use std:: in c++
When you are using "std::" it means that you will grap the following command
from the "std" namespace.
The std namespace is an abbreviation for standard
If you use "std::" you hvae to include "#include <iostream>"
Example 2: using std c++
using namespace std;
Example 3: use of strstr in c++
/* strstr example */
#include <stdio.h>
#include <string.h>
int main ()
{
char str[] ="This is a simple string";
char * pch;
pch = strstr (str,"simple");
strncpy (pch,"sample",6);
puts (str);
return 0;
}
Example 4: strcmp c++
int strcmp ( const char * str1, const char * str2 );
// returning value | indicates
// <0 the first character that does not match has a lower value in ptr1 than in ptr2
// 0 the contents of both strings are equal
// >0 the first character that does not match has a greater value in ptr1 than in ptr2