Data commit

Task/Modular-arithmetic/C/modular-arithmetic.c

@@ -0,0 +1,52 @@
+#include <stdio.h>
+
+struct ModularArithmetic {
+    int value;
+    int modulus;
+};
+
+struct ModularArithmetic make(const int value, const int modulus) {
+    struct ModularArithmetic r = { value % modulus, modulus };
+    return r;
+}
+
+struct ModularArithmetic add(const struct ModularArithmetic a, const struct ModularArithmetic b) {
+    return make(a.value + b.value, a.modulus);
+}
+
+struct ModularArithmetic addi(const struct ModularArithmetic a, const int v) {
+    return make(a.value + v, a.modulus);
+}
+
+struct ModularArithmetic mul(const struct ModularArithmetic a, const struct ModularArithmetic b) {
+    return make(a.value * b.value, a.modulus);
+}
+
+struct ModularArithmetic pow(const struct ModularArithmetic b, int pow) {
+    struct ModularArithmetic r = make(1, b.modulus);
+    while (pow-- > 0) {
+        r = mul(r, b);
+    }
+    return r;
+}
+
+void print(const struct ModularArithmetic v) {
+    printf("ModularArithmetic(%d, %d)", v.value, v.modulus);
+}
+
+struct ModularArithmetic f(const struct ModularArithmetic x) {
+    return addi(add(pow(x, 100), x), 1);
+}
+
+int main() {
+    struct ModularArithmetic input = make(10, 13);
+    struct ModularArithmetic output = f(input);
+
+    printf("f(");
+    print(input);
+    printf(") = ");
+    print(output);
+    printf("\n");
+
+    return 0;
+}