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Task/Catamorphism/C/catamorphism.c

@@ -0,0 +1,24 @@
+#include <stdio.h>
+
+typedef int (*intFn)(int, int);
+
+int reduce(intFn fn, int size, int *elms)
+{
+    int i, val = *elms;
+    for (i = 1; i < size; ++i)
+        val = fn(val, elms[i]);
+    return val;
+}
+
+int add(int a, int b) { return a + b; }
+int sub(int a, int b) { return a - b; }
+int mul(int a, int b) { return a * b; }
+
+int main(void)
+{
+    int nums[] = {1, 2, 3, 4, 5};
+    printf("%d\n", reduce(add, 5, nums));
+    printf("%d\n", reduce(sub, 5, nums));
+    printf("%d\n", reduce(mul, 5, nums));
+    return 0;
+}