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1 files changed, 88 insertions, 0 deletions

diff --git a/22_tests_power/test-power.c b/22_tests_power/test-power.c
new file mode 100644
index 0000000..95cb54e
--- /dev/null
+++ b/22_tests_power/test-power.c
@@ -0,0 +1,88 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+unsigned power (unsigned x, unsigned y);
+
+int main() {
+  unsigned x;
+  unsigned y;
+  unsigned ans;
+
+  x = 2;
+  y = 0;
+  ans = 1;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+  x = 1;
+  y = 0;
+  ans = 1;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 1;
+  y = 1;
+  ans = 1;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 2;
+  y = 1;
+  ans = 2;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 2;
+  y = 3;
+  ans = 8;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 3;
+  y = 3;
+  ans = 27;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 1;
+  y = 3;
+  ans = 1;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 0;
+  y = 0;
+  ans = 1;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = 3;
+  y = 2;
+  ans = 9;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = -3;
+  y = 2;
+  ans = 9;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  x = -2;
+  y = 3;
+  ans = -8;
+  if (ans != power(x, y)) {
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}