67 lines
1.6 KiB
D
67 lines
1.6 KiB
D
module main;
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import std.stdio;
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void main() {
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int kg = 5;
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int g = kg2g(kg);
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writeln("kg: ", kg);
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writeln(" g: ", g);
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// --- --- ---
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writeln("--- --- ---");
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int remainder = 0;
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int result = divide(10, 4, remainder);
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writeln(" result: ", result);
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writeln("remainder: ", remainder);
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// --- --- ---
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writeln("--- --- ---");
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int[] array = [1, 2, 3, 4];
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const int[] constArray = [5, 6, 7, 8];
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immutable int[] immutableArray = [9, 10, 11, 12];
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int[] arrayResult = doSomething(array);
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const int[] constArrayResult = doSomething(constArray);
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immutable int[] immutableArrayResult = doSomething(immutableArray);
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int[] arr = doSomething(constArray); // error! cannot do implicit conversion between type qualifiers
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// Error: cannot implicitly convert expression `doSomething(constArray)` of type `const(int)[]` to `int[]`
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writeln(" a: ", arrayResult);
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writeln("ca: ", constArrayResult);
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writeln("ia: ", immutableArrayResult);
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}
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/// kilogram to gram converter
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int kg2g(in int kg) {
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// kg = 2; // error, cannot modify, read-only
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int g = kg * 1000;
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return g;
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}
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/// division and calculates remainder
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int divide(in int value, in int divisor, out int remainder) {
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assert(remainder == int.init); // remainder is for output, it is initialized to 0
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// calculate
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remainder = value % divisor;
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int result = value / divisor;
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return result;
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}
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/// imagine it does something useful
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inout(int)[] doSomething(inout(int)[] values) {
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// do some work
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return values;
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}
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