fix hw3 some changes

hws/hw3/matutil.c

@@ -0,0 +1,67 @@
+#include "matutil.h"
+
+void print_vector_float(int size, float *v) {
+    int i;
+    for (i = 0; i < size; i++) {
+        printf("%6.2f ", v[i]);
+    }
+    printf("\n");
+}
+
+void print_vector_int(int size, int *v) {
+    int i;
+    for (i = 0; i < size; i++) {
+        printf("%d ", v[i]);
+    }
+    printf("\n");
+}
+
+float **new_matrix(int m, int n) {
+    return matrix(1, m, 1, n);
+}
+
+void simple_free_matrix(int m, int n, float **mat) {
+    free_matrix(mat, 1, m, 1, n);
+}
+
+void print_matrix(int m, int n, float **mat) {
+    int i, j;
+    for (i = 1; i <= m; i++) {
+        for (j = 1; j <= n; j++) {
+            printf("%6.2f ", mat[i][j]);
+        }
+        printf("\n");
+    }
+}
+
+void copy_matrix(int m, int n, float **src, float **dst) {
+    int i, j;
+    for (i = 1; i <= m; i++) {
+        for (j = 1; j <= n; j++) {
+            dst[i][j] = src[i][j];
+        }
+    }
+}
+
+/* for JMatrixData */
+
+void copy_jmatdata(JMatrixData *src, JMatrixData *dst) {
+    dst->m = src->m;
+    dst->n = src->n;
+    copy_matrix(src->m, src->n, src->a, dst->a);
+    copy_matrix(src->m, 1, src->b, dst->b);
+}
+
+void free_jmatdata(JMatrixData *data) {
+    simple_free_matrix(data->m, data->n, data->a);
+    simple_free_matrix(data->m, 1, data->b);
+}
+
+JMatrixData *new_jmatdata(int m, int n) {
+    JMatrixData *data = malloc(sizeof(JMatrixData));
+    data->m = m;
+    data->n = n;
+    data->a = new_matrix(data->m, data->n);
+    data->b = new_matrix(data->m, 1);
+    return data;
+}