Create F2_16.c

F2_16.c

@@ -0,0 +1,80 @@
+void intToString(int num, char result[], int* pos) {
+    if (num == 0) {
+        result[(*pos)++] = '0';
+        return;
+    }
+
+    int digits[10];
+    int count = 0;
+    if (num < 0) {
+        result[(*pos)++] = '-';
+        num = -num;
+    }
+    while (num > 0) {
+        digits[count++] = num % 10;
+        num /= 10;
+    }
+    for (int i = count - 1; i >= 0; i--) {
+        result[(*pos)++] = '0' + digits[i];
+    }
+}
+
+int add(int c1, int n1, int d1, int c2, int n2, int d2, char result[], int len) {
+    int commonDenominator = d1 * d2;
+    int numeratorSum = n1 * d2 + n2 * d1;
+    int characteristicSum = c1 + c2 + numeratorSum / commonDenominator;
+    numeratorSum %= commonDenominator;
+
+    int pos = 0;
+    intToString(characteristicSum, result, &pos);
+
+    result[pos++] = '.';
+
+    if (numeratorSum == 0) {
+        result[pos++] = '0';
+    } else {
+        int divisor = commonDenominator / 10;
+        while (divisor > 0 && numeratorSum / divisor == 0) {
+            result[pos++] = '0';
+            divisor /= 10;
+        }
+        while (divisor > 0) {
+            result[pos++] = '0' + numeratorSum / divisor;
+            numeratorSum %= divisor;
+            divisor /= 10;
+        }
+    }
+
+    result[pos] = '\0';
+    return 1;
+}
+
+int subtract(int c1, int n1, int d1, int c2, int n2, int d2, char result[], int len) {
+    int commonDenominator = d1 * d2;
+    int numeratorDiff = n1 * d2 - n2 * d1;
+    int characteristicDiff = c1 - c2 + numeratorDiff / commonDenominator;
+    numeratorDiff %= commonDenominator;
+
+    int pos = 0;
+    intToString(characteristicDiff, result, &pos);
+
+    result[pos++] = '.';
+
+    if (numeratorDiff == 0) {
+        result[pos++] = '0';
+    } else {
+        int divisor = commonDenominator / 10;
+        while (divisor > 0 && numeratorDiff / divisor == 0) {
+            result[pos++] = '0';
+            divisor /= 10;
+        }
+        while (divisor > 0) {
+            result[pos++] = '0' + numeratorDiff / divisor;
+            numeratorDiff %= divisor;
+            divisor /= 10;
+        }
+    }
+
+    result[pos] = '\0';
+    return 1;
+}