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STEP1_Basics/6_Files/main.kt

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+import java.io.File
+
+fun main() {
+    print("Enter a: "); val a = readln().toInt()
+    print("Enter b: "); val b = readln().toInt()
+
+    // Create matrix
+    var matrix: Array<Array<Int>> = Array(2) { Array(2) {0} }
+    matrix[0][0] = a ; matrix[1][0] = b
+    matrix[0][1] = a + 1; matrix[1][1] = b + 1
+
+    // Make strings
+    var str1: String = "${matrix[0][0]} ${matrix[0][1]}"
+    var str2: String = "${matrix[1][0]} ${matrix[1][1]}"
+    
+    // Write result
+    val file = File("file")
+    file.writeText("""
+        $str1
+        $str2
+    """.trimIndent())
+
+    // Read result
+    var new_matrix: Array<Array<Int>> = Array(2) { Array(2) {0} }
+
+    val lines: List<String> = file.readLines()
+    var first = true
+    for (i in lines) {
+        if (first) {
+            // Convert List<String> -> List<Int> -> Array<Int>
+            new_matrix[0] = i.split(" ").map { it.toInt() }.toTypedArray()
+            first = false
+        }
+        else {
+            new_matrix[1] = i.split(" ").map { it.toInt() }.toTypedArray()
+        }
+    }
+
+    // Get output
+    println("""
+        Original matrix:
+        ${matrix[0][0]} ${matrix[0][1]}
+        ${matrix[1][0]} ${matrix[1][1]}
+        
+        Readed matrix:
+        ${new_matrix[0][0]} ${new_matrix[0][1]}
+        ${new_matrix[1][0]} ${new_matrix[1][1]}
+    """.trimIndent())
+
+}