Strange Error in 5Ex if: 2 3 5 2 3

2025.03.14/5Ex/solve.c

@@ -0,0 +1,36 @@
+#include "solve.h"
+#include "math.h"
+
+#define eps 1e-9
+
+int compare(const double a, const double b)
+{
+	if (a - b > eps) return 1;
+	else if (b - a > eps) return -1;
+	return 0;
+}
+
+double t5_solve(const double *A, const double *b, int n, int m)
+{
+	double temp, summa, maximum = 0;
+	int i, j, k;
+
+	if (n <= 0 || m <= 0) return 0;
+
+	for (i = 0; i < n; i++)
+	{
+		summa = 0;
+		for (k = 0; k < n; k++) {
+			temp = 0;
+			for (j = 0; j < m; j++)
+				temp += A[i * m + j] * b[j * n + k];
+
+			if (k == i) temp--;
+			summa += fabs(temp);
+		}
+		if (compare(summa, maximum) == 1) maximum = summa;		
+	}
+
+	return maximum;
+}
+