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// Solidity program to demonstrate
// Inline Assembly  
pragma solidity ^0.4.0;
  
// Creating a contract
contract InlineAssembly
{  
    // Defining function
  function add(uint a) view returns (uint b)
    {
        // Inline assembly code
        assembly
        {
  
            // Creating a new variable 'c'
            // Calculate the sum of 'a+16'  
            // with the 'add' opcode  
            // assign the value to the 'c'  
            let c := add(a, 16)  
  
            // Use 'mstore' opcode to  
            // store 'c' in memory  
            // at memory address 0x80  
            mstore(0x80, c)  
            { 
              // Creating a new variable'  
              // Calculate the sum of 'sload(c)+12'  
              // means values in variable 'c'  
              // with the 'add' opcode  
              // assign the value to 'd'  
              let d := add(sload(c), 12)  
  
              // assign the value of 'd' to 'b'  
              b := d  
  
              // 'd' is deallocated now  
            } 
            // Calculate the sum of 'b+c' with the 'add' opcode  
            // assign the value to 'b'  
            b := add(b, c)  
  
            // 'c' is deallocated here  
        }  
    }  
}