progress on desktop

03-MatrixAddition (fork)/matAddFork.c

@@ -0,0 +1,81 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main() {
+    int A[MAX][MAX], B[MAX][MAX], C[MAX][MAX];
+    int i, j, k, sum = 0;
+    int shmid;
+    int *shm;
+
+    // Allocate shared memory
+    shmid = shmget(IPC_PRIVATE, MAX * MAX * sizeof(int), 0666 | IPC_CREAT);
+    if (shmid < 0) {
+        perror("shmget");
+        exit(1);
+    }
+
+    // Attach shared memory
+    shm = shmat(shmid, NULL, 0);
+    if (shm == (int *)-1) {
+        perror("shmat");
+        exit(1);
+    }
+
+    // Initialize matrices A and B
+    for (i = 0; i < MAX; i++) {
+        for (j = 0; j < MAX; j++) {
+            A[i][j] = i + j;
+            B[i][j] = i - j;
+        }
+    }
+
+    // Fork a child process
+    pid_t pid = fork();
+
+    if (pid == -1) {
+        perror("fork");
+        exit(1);
+    }
+    else if (pid == 0) { // Child process
+        for (i = 0; i < MAX; i++) {
+            for (j = 0; j < MAX; j++) {
+                sum = 0;
+                for (k = 0; k < MAX; k++) {
+                    sum += A[i][k] * B[k][j];
+                }
+                *(shm + i * MAX + j) = sum;
+            }
+        }
+        exit(0);
+    }
+    else { // Parent process
+        wait(NULL);
+
+        // Retrieve result from shared memory
+        for (i = 0; i < MAX; i++) {
+            for (j = 0; j < MAX; j++) {
+                C[i][j] = *(shm + i * MAX + j);
+            }
+        }
+
+        // Print result matrix C
+        printf("Matrix C:\n");
+        for (i = 0; i < MAX; i++) {
+            for (j = 0; j < MAX; j++) {
+                printf("%d ", C[i][j]);
+            }
+            printf("\n");
+        }
+
+        // Detach and remove shared memory
+        shmdt(shm);
+        shmctl(shmid, IPC_RMID, NULL);
+        munmap(shm);
+    }
+
+    return 0;
+}

03-MatrixAddition (fork)/matRead.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main(int argc, char* argv[])
+{
+    int rows, columns;
+    FILE* input = fopen(argv[1], "r");
+    fscanf(input, "%d", &rows);
+    fscanf(input, "%d", &columns);
+    for(int i = 0; i < rows; i++) {
+        for(int j = 0; j < columns; j++) {
+            int value;
+            fscanf(input, "%d", &value);
+        }
+    }
+    fclose(input);
+}