LICENSES/Apache-2.0.txt

+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
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+END OF TERMS AND CONDITIONS
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+APPENDIX: How to apply the Apache License to your work.
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+Copyright [yyyy] [name of copyright owner]
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+Licensed under the Apache License, Version 2.0 (the "License");
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+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

meson.build

+# SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce.cowan@strath.ac.uk>
+#
+# SPDX-License-Identifier: Apache-2.0
+
 project('ee312-tutorial', 'c')
 
 cc = meson.get_compiler('c')

q1-family.c

+/*
+ * SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce.cowan@strath.ac.uk>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <stdio.h>
 
 int

q2-thousand.c

+/*
+ * SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce.cowan@strath.ac.uk>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <stdio.h>
 
 int

q3-nums.c

+/*
+ * SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce.cowan@strath.ac.uk>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <stdio.h>
 
 int

q4-qsort.c

+/*
+ * SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce.cowan@strath.ac.uk>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <stdio.h>
 #include <stdlib.h> 
 

q4-sort.c

+/*
+ * SPDX-FileCopyrightText: 2018 Bruce Cowan <bruce.cowan@strath.ac.uk>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <stdio.h>
 
 #define N 5

q5-cos.c

-#include <math.h>
+/*
+ * SPDX-FileCopyrightText: 2018-2022 Bruce Cowan <bruce.cowan@strath.ac.uk>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 #include <stdio.h>
+#include <tgmath.h>
 
 /**
  * Converts from degrees to radians
@@ -31,19 +37,19 @@ rad_to_degrees (float radians)
 static float
 calc_cos (float angle)
 {
-    float ret = cosf (angle);
+    float ret = cos (angle);
     printf ("cos (%.6f) = %.6f\n", angle, ret);
 
     return ret;
 }
 
 /**
- * Finds the inverse cosine 
+ * Finds the inverse cosine (degrees)
  */
 static float
 calc_inv_cos (float arg)
 {
-    float inv = acosf (arg);
+    float inv = acos (arg);
     printf ("acos (%.6f) = %.6f\n", arg, inv);
     
     return rad_to_degrees (inv);
@@ -54,7 +60,7 @@ main (void)
 {
     float radians = M_PI;
 
-    float difference = radians - deg_to_radians (calc_inv_cos (calc_cos (radians)));
+    float difference = fmod (radians, 2.0 * M_PI) - deg_to_radians (calc_inv_cos (calc_cos (radians)));
     printf ("The difference is %.6f\n", difference);
 
     return 0;