Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Given the following local variable declarations:

   string s1 = "Welcome to C++ World";  

  string s2, s3; 

s2=s1;   

s3 = s1 + s2;

 

 What is the value of the following expressions (or ERROR)?  

  1. cout<<s1<<endl;
  2. cout<<s2<<endl;
  3. cout<<s3<<endl;
  4. cout<<s1[1]<<endl;
  5. cout<<s1.length()<<endl;
  6. cout<<s1.at(1)<<endl;
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