Add Fraction Math in C

archive/c/c/fraction-math.c

@@ -0,0 +1,125 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct {
+    int numerator;
+    int denominator;
+} Fraction;
+
+int gcd(int a, int b) {
+    if (b == 0) return a;
+    return gcd(b, a % b);
+}
+
+Fraction simplify(Fraction f) {
+    int g = gcd(abs(f.numerator), abs(f.denominator));
+    f.numerator /= g;
+    f.denominator /= g;
+    if (f.denominator < 0) {
+        f.numerator = -f.numerator;
+        f.denominator = -f.denominator;
+    }
+    return f;
+}
+
+Fraction parse_fraction(const char* str) {
+    Fraction f;
+    sscanf(str, "%d/%d", &f.numerator, &f.denominator);
+    return simplify(f);
+}
+
+Fraction add(Fraction a, Fraction b) {
+    Fraction result = {
+        a.numerator * b.denominator + b.numerator * a.denominator,
+        a.denominator * b.denominator
+    };
+    return simplify(result);
+}
+
+Fraction subtract(Fraction a, Fraction b) {
+    Fraction result = {
+        a.numerator * b.denominator - b.numerator * a.denominator,
+        a.denominator * b.denominator
+    };
+    return simplify(result);
+}
+
+Fraction multiply(Fraction a, Fraction b) {
+    Fraction result = {
+        a.numerator * b.numerator,
+        a.denominator * b.denominator
+    };
+    return simplify(result);
+}
+
+Fraction divide(Fraction a, Fraction b) {
+    Fraction result = {
+        a.numerator * b.denominator,
+        a.denominator * b.numerator
+    };
+    return simplify(result);
+}
+
+int compare(Fraction a, Fraction b) {
+    int lhs = a.numerator * b.denominator;
+    int rhs = b.numerator * a.denominator;
+    if (lhs < rhs) return -1;
+    if (lhs > rhs) return 1;
+    return 0;
+}
+
+void print_fraction(Fraction f) {
+    printf("%d/%d\n", f.numerator, f.denominator);
+}
+
+int main(int argc, char* argv[]) {
+    if (argc != 4) {
+        printf("Usage: ./fraction-math operand1 operator operand2\n");
+        return 1;
+    }
+
+    Fraction a = parse_fraction(argv[1]);
+    Fraction b = parse_fraction(argv[3]);
+    char* op = argv[2];
+
+    Fraction result;
+    int cmp;
+
+    if (strcmp(op, "+") == 0) {
+        result = add(a, b);
+        print_fraction(result);
+    } else if (strcmp(op, "-") == 0) {
+        result = subtract(a, b);
+        print_fraction(result);
+    } else if (strcmp(op, "*") == 0) {
+        result = multiply(a, b);
+        print_fraction(result);
+    } else if (strcmp(op, "/") == 0) {
+        result = divide(a, b);
+        print_fraction(result);
+    } else if (strcmp(op, "==") == 0) {
+        cmp = compare(a, b);
+        printf("%d\n", cmp == 0);
+    } else if (strcmp(op, ">") == 0) {
+        cmp = compare(a, b);
+        printf("%d\n", cmp > 0);
+    } else if (strcmp(op, "<") == 0) {
+        cmp = compare(a, b);
+        printf("%d\n", cmp < 0);
+    } else if (strcmp(op, ">=") == 0) {
+        cmp = compare(a, b);
+        printf("%d\n", cmp >= 0);
+    } else if (strcmp(op, "<=") == 0) {
+        cmp = compare(a, b);
+        printf("%d\n", cmp <= 0);
+    } else if (strcmp(op, "!=") == 0) {
+        cmp = compare(a, b);
+        printf("%d\n", cmp != 0);
+    } else {
+        printf("Invalid operator\n");
+        return 1;
+    }
+
+    return 0;
+}