progress on desktop

01-StackMachine/stackm.c

@@ -7,7 +7,7 @@
 
 typedef struct node {
     int value;
-    struct node* next;
+    struct node *next;
 } node;
 
 typedef struct stackm {
@@ -16,63 +16,134 @@ typedef struct stackm {
 
 
 void smInit(struct stackm *myStack){
-    (myStack->top) = NULL;
+    myStack->top = NULL;
 }
 
 
 int smSize(struct stackm *myStack){
-    while(myStack->top->next != NULL) {
+    node *current = myStack->top;
-        
+    int count = 0;
+    while(current != NULL) {
+        count++;
+        current = current->next;
     }
-    return myStack->top;
+    return count;
 }
 
 
 int smPush(struct stackm *myStack, int toStore){
-    node node;
+
-    node.value = toStore;
+    node *newNode = (node *)malloc(sizeof(node));
-    
+    if (newNode == NULL) {
-    *(myStack->top->next) = node;
+        return 0;
+    } else {
+        newNode->value = toStore;
+        newNode->next = myStack->top;
+        myStack->top = newNode;
+        return 1;
+    }
 }
 
 
 int smPop(struct stackm *myStack){
-
+    if(myStack->top == NULL) {
+        return 0;
+    }
+    node *temp = myStack->top;
+    myStack->top = temp->next;
+    free(temp);
+    return 1;
 }
 
 
 int smTop(struct stackm *myStack, int* toStore){
-
+    if (myStack->top == NULL || toStore == NULL) {
+        return 0;
+    } else {
+        toStore = (int*)myStack->top;
+        return 1;
+    }
 }
 
 
 void smClear(struct stackm *myStack){
-
+    while (myStack->top != NULL) {
+        node *temp = myStack->top;
+        myStack->top = temp->next;
+        free(temp);
+    }
 }
 
 
 void smPrint(struct stackm *myStack){
-
+    node *temp = myStack->top;
+    printf("==Stack Contents==\n");
+    printf("Top -> ");
+    while (temp != NULL) {
+        printf("%d ", temp->value);
+        temp = temp->next;
+        printf("\n");
+    }
 }
 
 
 int smAdd(struct stackm* myStack){
-
+    if(smSize(myStack) <= 2){
+        return 0;
+    } else {
+        int sum = (myStack->top->value) + (myStack->top->next->value);
+        smPush(myStack,sum);
+        return 1;
+    }
 }
 
 
 int smSub(struct stackm* myStack){
-
+    if(smSize(myStack) <= 2){
+        return 0;
+    } else {
+        int result = (myStack->top->value) - (myStack->top->next->value);
+        smPop(myStack);
+        smPop(myStack);
+        smPush(myStack,result);
+        return 1;
+    }
 }
 
 
 int smMult(struct stackm* myStack){
-
+    if(smSize(myStack) <= 2){
+        return 0;
+    } else {
+        int sum = (myStack->top->value) * (myStack->top->next->value);
+        smPush(myStack,sum);
+        return 1;
+    }
 }
 
 
 int smRotate(struct stackm* myStack, int depth){
-
+    if(depth == 0){
+        return 0;
+    } else {
+        node *temp = myStack->top;
+        int count = 1;
+        while (count < depth && temp != NULL) {
+            temp = temp->next;
+            count++;
+        }
+        if (temp == NULL) {
+            return 0;
+        }
+        node *nNode = temp;
+        while (temp->next != NULL) {
+            temp = temp->next;
+        }
+        temp->next = myStack->top;
+        myStack->top = nNode->next;
+        nNode->next = NULL;
+        return 1;
+    }
 }
 
 #endif

02-TeenyTinyShell/ttsh.c

@@ -10,6 +10,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <stdlib.h>
 
 #define INPUT_MAX 256
 #define CMD_MAX 5
@@ -71,6 +72,8 @@ int main()
     char user_input[INPUT_MAX];
     char cmd_strs[CMD_MAX][INPUT_MAX];
 
+    int quit_flag = 0;
+
     // TODO need to be able to get input from
     //    the user in a loop
 
@@ -84,6 +87,11 @@ int main()
     }
 
     // TODO: Figure out how to handle the 'quit' command
+    if (strcmp(user_input, "quit") == 0){
+        printf("Quitting...");
+        exit(0);
+    }
+
 
     // Chop the input into command strings
     int cmd_count = parse_commands(user_input, cmd_strs);
@@ -101,6 +109,7 @@ int main()
         //        NOTE: the command name is always the first argument
         //    2) fork a process
         //    3) execute the command with execvp
+        
     }
 
     return 0;

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);
+}

CS3841.code-workspace

@@ -0,0 +1,12 @@
+{
+	"folders": [
+		{
+			"uri": "vscode-remote://wsl+ubuntu/mnt/c/Users/Trevor/Documents/GitRepos/CS3841"
+		}
+	],
+	"settings": {
+		"files.associations": {
+			"stdio.h": "c"
+		}
+	}
+}