How to resolve the algorithm Compile-time calculation step by step in the Tcl programming language

Published on 12 May 2024 09:40 PM
#Tcl

How to resolve the algorithm Compile-time calculation step by step in the Tcl programming language

Table of Contents

Problem Statement

Some programming languages allow calculation of values at compile time.

Calculate   10!   (ten factorial)   at compile time. Print the result when the program is run. Discuss what limitations apply to compile-time calculations in your language.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Compile-time calculation step by step in the Tcl programming language

Source code in the tcl programming language

proc makeFacExpr n {
    set exp 1
    for {set i 2} {$i <= $n} {incr i} {
        append exp " * $i"
    }
    return "expr \{$exp\}"
}
eval [makeFacExpr 10]


% tcl::unsupported::disassemble script [makeFacExpr 10]
ByteCode 0x0x4de10, refCt 1, epoch 3, interp 0x0x31c10 (epoch 3)
  Source "expr {1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10}"
  Cmds 1, src 45, inst 3, litObjs 1, aux 0, stkDepth 1, code/src 0.00
  Commands 1:
      1: pc 0-1, src 0-44
  Command 1: "expr {1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10}"
    (0) push1 0 	# "3628800"
    (2) done

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