Finished assignment. Added function to calculate testat length, generate random order and print plan.

Testat-Planer.zig

@@ -1,5 +1,4 @@
 const std = @import("std");
-const writer = std.io.getStdOut().writer();
 
 
 const Timestamp = struct {
@@ -8,50 +7,49 @@ const Timestamp = struct {
 };
 
 const testees:[]const []const u8 = &[_][] const u8 {
-    "1",
-    "2",
-    "3",
-    "4",
-    "5",
-    "6",
-    "7",
-    "8"
+    "Gruppe A",
+    "Gruppe B",
+    "Gruppe C",
+    "Gruppe D",
+    "Gruppe E",
+    "Gruppe F",
+    "Gruppe G",
+    "Gruppe H",
+    "Gruppe I",
+    "Gruppe J",
 };
 
 const number_of_testees: u64 = testees.len;         // len von testees
-const total_minutes: u64 = 60;                  // Gesamte Dauer in min
-const pause_minutes: u64 = 2;                   // Länge der Pause zwischen 2 Testaten
+const total_minutes: u64 = 190;                     // Gesamte Dauer in min
+const pause_minutes: u64 = 5;                       // Länge der Pause zwischen 2 Testaten
 
 
 pub fn main () !void {
 
-    var testStamp = Timestamp {
-        .hours = 13,
-        .minutes = 5,
+    var time = Timestamp {
+        .hours = 12,
+        .minutes = 0,
     };
     
-    try writer.print("Amount tests: {d} \n\n", .{number_of_testees});
-    
-    try printTimestamp(&testStamp);
-    try writer.print("\n", .{});
-    try printPlan();
-
-    try addMinutesToTimestamp(&testStamp, 175);
-    try printTimestamp(&testStamp);
+    try printPlan(&time);
 }
 
-// Printet timestamp im Format HH:MM
+
+//? Printet timestamp im Format HH:MM
 pub fn printTimestamp(ts: *Timestamp) !void {
 
+    const writer = std.io.getStdOut().writer();
+
     try writer.print("{0d:0>2}:{1d:0>2}", .{ ts.hours, ts.minutes });
 }
 
-pub fn addMinutesToTimestamp(ts: *Timestamp, min: u16) !void{
+
+//? Add a given minute amount to the given timestamp
+pub fn addMinutesToTimestamp(ts: *Timestamp, min: u16) void{
 
     var addHours: u64 = min / 60;
     var addMinutes: u64 = min%60;
 
-
     if ((addMinutes + ts.minutes) >= 60){
         addMinutes = (addMinutes + ts.minutes)%60;
         addHours += 1;
@@ -60,27 +58,34 @@ pub fn addMinutesToTimestamp(ts: *Timestamp, min: u16) !void{
 
     ts.hours += addHours;
     ts.minutes += addMinutes;
-
 }
 
-pub fn printPlan() !void {
+
+//? Print the whole test-plan
+pub fn printPlan(ts: *Timestamp) !void {
 
     const rand = std.crypto.random;
+    const writer = std.io.getStdOut().writer();
 
+    //? BLOCK CALCULATION
+    const testTime: u64 = total_minutes - ((number_of_testees - 1) * pause_minutes);
+
+    const timePerTest: u64 = testTime / number_of_testees;
+
+
+    //? CREATE RANDOM ORDER ARRAY 
     const noneNumber:u64 = number_of_testees+1;
+    var testees_order: [number_of_testees]u64 = undefined;
 
-    var testees_order: [number_of_testees]u8 = undefined;
-    
-    // Fill order array with noneNumber
+    //? Fill order array with noneNumber
     for (testees_order, 0..) |_, index| {
         testees_order[index] = noneNumber;
     }
 
-    
-    // Fill order array with a random order
+    //? Fill order array with order until full
     for (testees, 0..) |_, blockIndex| {
         while(true) {
-            const randIndex:u8 = rand.intRangeLessThan(u8, 0, number_of_testees);
+            const randIndex:u64 = rand.intRangeLessThan(u64, 0, number_of_testees);
 
             if (arrayContains(&testees_order, randIndex)) {
                 continue;
@@ -90,12 +95,27 @@ pub fn printPlan() !void {
         }
     }
 
-    for (testees_order, 0..) |elem, index| {
-        try writer.print("Nr.{d}: {s} \n", .{index, testees[elem]});
+
+    //? PLAN OUTPUT
+    try writer.print("{d} Gruppen x {d} Minuten ({d} Minuten Pause dazwischen) \n", .{number_of_testees, timePerTest, pause_minutes});
+    try writer.print("Beginn des Testat-Termins: ", .{});
+    try printTimestamp(ts);
+    try writer.print("\n", .{});
+    try writer.print("Testat-Bloecke: \n", .{});
+
+    for (testees_order, 0..) |testee, index| {
+        try writer.print("{d}.) ", .{index+1});
+        try printTimestamp(ts);
+        try writer.print("-", .{});
+        addMinutesToTimestamp(ts, timePerTest);
+        try printTimestamp(ts);
+        addMinutesToTimestamp(ts, pause_minutes);
+        try writer.print(": {s} \n", .{testees[testee]});
     }
 }
 
-pub fn arrayContains(arr: []u8, q: i64) bool {
+// Check if a given array contains a given element
+pub fn arrayContains(arr: []u64, q: u64) bool {
     for (arr) |element| {
         if (element == q) {
             return true;