From c956594b3b9349a982fe4721b31de922b6cacd88 Mon Sep 17 00:00:00 2001
From: Benjamin Chausse <benjamin@chausse.xyz>
Date: Tue, 4 Oct 2022 09:50:04 -0400
Subject: operations sur des matrices

---
 matAdd.c  | 30 ++++++++++++++++++++++++++++++
 matMult.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 matAdd.c
 create mode 100644 matMult.c

diff --git a/matAdd.c b/matAdd.c
new file mode 100644
index 0000000..a6120c2
--- /dev/null
+++ b/matAdd.c
@@ -0,0 +1,30 @@
+/* matAdd.c
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <benjamin@chausse.xyz> wrote this file. As long as you retain this notice
+ * you can do whatever you want with this stuff. If we meet some day, and you
+ * think this stuff is worth it, you can buy me a beer in return.
+ * Benjamin Chausse
+ * ----------------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include "format.h"
+#include "testData.h"
+
+int *matAdd(int *ma, int *mb, int w, int h){
+
+  int res[h][w];
+  for (int i=0;i<w;i++){
+    for (int j=0;j<h;j++){
+      res[i][j] = *(ma+(i*h)+j) + *(mb+(i*h)+j);
+    }
+  }
+    return *res;
+}
+
+int main(){
+  int *test1 = matAdd(mtrxA,mtrxB,3,3);
+  print(test1,3,3);
+  return 0;
+}
diff --git a/matMult.c b/matMult.c
new file mode 100644
index 0000000..0de8daa
--- /dev/null
+++ b/matMult.c
@@ -0,0 +1,43 @@
+/* matAdd.c
+ * ----------------------------------------------------------------------------
+ * "THE BEER-WARE LICENSE" (Revision 42):
+ * <benjamin@chausse.xyz> wrote this file. As long as you retain this notice
+ * you can do whatever you want with this stuff. If we meet some day, and you
+ * think this stuff is worth it, you can buy me a beer in return.
+ * Benjamin Chausse
+ * ----------------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include "format.h"
+#include "testData.h"
+
+int *matMult(int *ma, int *mb, int h1, int c, int w2){
+
+  int res[h1][w2];
+  for (int i=0;i<h1;i++){
+    for (int j=0;j<w2;j++){
+      int cell = 0;
+      for (int k=0;k<c;k++){
+        cell += *((ma+i*c)+k) * *((mb+w2*k)+j);
+      }
+      res[i][j] = cell;
+    }
+  }
+  return *res;
+}
+
+int main(){
+  int A[3][2] = {
+    {3, 4},
+    {7, 2},
+    {5, 9}
+  };
+  int B[2][3] = {
+    {3, 1, 5},
+    {6, 9, 7}
+  };
+  int *C = matMult(A,B,3,2,3);
+  print(C,3,3);
+  return 0;
+}
-- 
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