//using for loop
#include<iostream>
using namespace std;
int main( )
{
char str1[80], str2[80];
cout<<“Enter first string: “;
cin>>str1;
cout<<“Enter second string: “;
cin>>str2;
int i;
for (i = 0; str1[i] == str2[i] && str1[i]!=’ ’ && str2[i]!=’ ’; i++);
if(str1[i] – str2[i] == 0)
cout << “Strings are equal”;
else
cout << “Strings are not equal”;
return 0;
}
Enter first string: bum
Enter second string: bum
Strings are equal
//using while loop
/* This program compare two strings entered by the user and displays the results whether they are
same or not*/
#include<iostream>
using namespace std;
int main()
{
char str1[80], str2[80];
int i=0;
cout<<“Enter first string: “;
cin>>str1;//input-first string
cout<<“Enter second string:n”;
cin>>str2;//input-second string
//loop for traversing each element of array
while(str1[i]!=’ ’||str2[i]!=’ ’)
{
//condition for checking equality of each character
if(str1[i]!=str2[i])
{
cout<<“Both the string are not same:n”;
break;
}
i++;
}
//checking condition for length of both strings
if(str1[i]==’ ’&& str2[i]==’ ’)
cout<<“Both the string are same:n”;
return 0;
}
- While loop is taken to traverse each element of character array up to last element i.e. ‘ ’.Inside this loop each character of both string is compared, if any one is mismatched then the string will not be same.So no need to check further , break the execution process and print “Both string are not same”.
- Another case is when string will be same.If both string will be same then they will have same length so at last execution of while loop it will encounter ‘ ’.So outside while same condition is checked and display result “Both string are same” if the condition satisfies.