From e782027f631c35805f9cb7d267e1a1f87d298495 Mon Sep 17 00:00:00 2001
From: Boris Stefanovic <owldev@bluewin.ch>
Date: Tue, 3 May 2022 15:22:52 +0200
Subject: [PATCH] save
---
.gitignore | 1 +
ex1/Makefile | 4 +--
ex1/ex1.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 78 insertions(+), 2 deletions(-)
diff --git a/.gitignore b/.gitignore
index 7353e7e..08fa83e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
build
*.o
+*.txt
diff --git a/ex1/Makefile b/ex1/Makefile
index b08d3eb..def2451 100644
--- a/ex1/Makefile
+++ b/ex1/Makefile
@@ -10,8 +10,8 @@ CC := gcc
CFLAGS := -std=c11 -Wall -Wextra -pedantic
CFLAGS_DEBUG := ${CFLAGS} -fsanitize=address -fsanitize=leak -g -DDEBUG
-LDEXTRA :=
-LDEXTRA_DEBUG :=
+LDEXTRA := -lm
+LDEXTRA_DEBUG := -lm
LDFLAGS := ${CFLAGS} ${LDEXTRA}
LDFLAGS_DEBUG := ${CFLAGS_DEBUG} ${LDEXTRA_DEBUG}
diff --git a/ex1/ex1.c b/ex1/ex1.c
index 68c42f8..124112e 100644
--- a/ex1/ex1.c
+++ b/ex1/ex1.c
@@ -1,6 +1,81 @@
+#include <math.h>
#include <stdio.h>
#include <stdlib.h>
+#define ROWS 5
+#define COLS 4
+#define ITERATIONS 10
+
+
+double** alloc(const int m, const int n) {
+ double** a = malloc(m * sizeof(double*));
+ for (int i = 0; i < n; ++i) {
+ a[i] = malloc(n * sizeof(double));
+ }
+ return a;
+}
+
+void destroy(double** a, const int m) {
+ for (int i = 0; i < m; ++i) {
+ free(a[i]);
+ }
+ free(a);
+}
+
+void init(double** a, const int m, const int n) {
+ for (int y = 0; y < m; ++y) {
+ for (int x = 0; x < n; ++x) {
+ a[y][x] = sqrt(y + x);
+ }
+ }
+}
+
+void mean(double** a, const int m, const int n, double** r) {
+ for (int y = 0; y < m; ++y) {
+ for (int x = 0; x < n; ++x) {
+ if (
+ (y == 0) |
+ (y == (m - 1)) |
+ (x == 0) |
+ (x == (n - 1))
+ ) {
+ r[y][x] = a[y][x];
+ } else {
+ r[y][x] = (
+ a[y][x + 1] +
+ a[y][x - 1] +
+ a[y + 1][x] +
+ a[y - 1][x] +
+ a[y][x]
+ ) / 5.0;
+ }
+ }
+ }
+}
+
+void print(double** a, const int m, const int n) {
+ for (int y = 0; y < m; ++y) {
+ for (int x = 0; x < n; ++x) {
+ printf("%lf", a[y][x]);
+ }
+ printf("\n");
+ }
+}
+
int main() {
+ double** m = alloc(ROWS, COLS);
+ double** n = alloc(ROWS, COLS);
+ init(m, ROWS, COLS);
+ double** swap;
+ for (int i = 0; i < ITERATIONS; ++i) {
+ mean(m, ROWS, COLS, n);
+ swap = m;
+ m = n;
+ n = swap;
+ }
+ print(m, ROWS, COLS);
+ destroy(m, ROWS);
+ destroy(n, ROWS);
+ return EXIT_SUCCESS;
}
--
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