Reverse String in Algol68

Published on 28 April 2022 (Updated: 02 February 2023)

Reverse String in Algol68

Welcome to the Reverse String in Algol68 page! Here, you’ll find the source code for this program as well as a description of how the program works.

Current Solution

PROC usage = VOID: printf(($gl$, "Usage: please provide a string"));

# Command-line arguments start at 4. If too few, exit #
IF argc < 4
THEN
    usage;
    stop
FI;

# Get 1st command-line argument. Exit if empty #
STRING s := argv(4);
IF UPB s = 0
THEN
    usage;
    stop
FI;

CHAR temp;
INT len := UPB s;
FOR n TO len OVER 2
DO
    temp := s[len + 1 - n];
    s[len + 1 - n] := s[n];
    s[n] := temp
OD;

printf(($gl$, s))

Reverse String in Algol68 was written by:

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How to Implement the Solution

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How to Run the Solution

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