21 lines
549 B
Kotlin
21 lines
549 B
Kotlin
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fun protectedInput(variableName: String): Int {
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do {
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try {
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print("Enter $variableName: ");
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return readln().toInt();
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} catch (e: Exception) {
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println("${variableName.uppercase()} must be an integer!");
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}
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} while (true)
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}
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fun main() {
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val n: Int = protectedInput("n");
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val m: Int = protectedInput("m");
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val a: Int = protectedInput("a");
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val b: Int = protectedInput("b");
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val s: Float = (b + m).toFloat() / 2 * (m - b + 1) * (n - a + 1);
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println("S = $s")
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}
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