84 lines
2.8 KiB
Plaintext
84 lines
2.8 KiB
Plaintext
// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/12/StringTest/Main.jack
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/** Test program for the OS String class. */
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class Main {
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/** Performs various string manipulations and displays their results. */
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function void main() {
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var String s;
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var String i;
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let s = String.new(0); // a zero-capacity string should be supported
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do s.dispose();
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let s = String.new(6); // capacity 6, make sure that length 5 is displayed
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let s = s.appendChar(97);
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let s = s.appendChar(98);
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let s = s.appendChar(99);
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let s = s.appendChar(100);
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let s = s.appendChar(101);
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do Output.printString("new,appendChar: ");
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do Output.printString(s); // new, appendChar: abcde
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do Output.println();
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let i = String.new(6);
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do i.setInt(12345);
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do Output.printString("setInt: ");
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do Output.printString(i); // setInt: 12345
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do Output.println();
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do i.setInt(-32767);
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do Output.printString("setInt: ");
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do Output.printString(i); // setInt: -32767
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do Output.println();
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do Output.printString("length: ");
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do Output.printInt(s.length()); // length: 5
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do Output.println();
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do Output.printString("charAt[2]: ");
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do Output.printInt(s.charAt(2)); // charAt[2]: 99
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do Output.println();
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do s.setCharAt(2, 45);
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do Output.printString("setCharAt(2,'-'): ");
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do Output.printString(s); // setCharAt(2,'-'): ab-de
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do Output.println();
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do s.eraseLastChar();
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do Output.printString("eraseLastChar: ");
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do Output.printString(s); // eraseLastChar: ab-d
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do Output.println();
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let s = "456";
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do Output.printString("intValue: ");
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do Output.printInt(s.intValue()); // intValue: 456
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do Output.println();
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let s = "-32123";
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do Output.printString("intValue: ");
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do Output.printInt(s.intValue()); // intValue: -32123
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do Output.println();
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do Output.printString("backSpace: ");
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do Output.printInt(String.backSpace()); // backSpace: 129
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do Output.println();
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do Output.printString("doubleQuote: ");
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do Output.printInt(String.doubleQuote());// doubleQuote: 34
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do Output.println();
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do Output.printString("newLine: ");
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do Output.printInt(String.newLine()); // newLine: 128
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do Output.println();
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do i.dispose();
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do s.dispose();
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return;
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}
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}
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