c-programming

commit 0fc9652907d06f18b6243cdfff7e9534dafb39cd
parent 70ee4ecf0f2cf358417289c00aa36ed940d96870
Author: Andrew Laack <andrew@laack.co>
Date:   Sun, 12 Oct 2025 13:04:08 -0500

Did some stuff in c w/ DSA and basic c stuff

Diffstat:
A
c-book/ch1/fahrenheit.c
 | 
15
+++++++++++++++
A
c-book/ch1/hello.c
 | 
6
++++++
A
c-book/ch1/max-int-size.c
 | 
54
++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
dsa/bst.c
 | 
69
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

4 files changed, 144 insertions(+), 0 deletions(-)
diff --git a/c-book/ch1/fahrenheit.c b/c-book/ch1/fahrenheit.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main(){
+    
+    // C = (5/9)(F - 32)
+
+    int step = 10;
+    
+    for (int i = 0 ; i <= 10; ++i){
+        int f = i * step;
+        printf("%d\t", f);
+        float c = (((float) f - 32) * 5 ) / 9;
+        printf("%f\n", c);
+    }
+}
diff --git a/c-book/ch1/hello.c b/c-book/ch1/hello.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(){
+    printf("H\bH\bHell\blo Wo\borld\bd\n");
+    return 0;
+}
diff --git a/c-book/ch1/max-int-size.c b/c-book/ch1/max-int-size.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+
+// This weirdness is why you might use stdint
+// size(long long) == size(long) is weird
+
+int printSigned(){
+    signed int current, prior;
+    
+    prior = 0;
+    current = 1;
+
+    while(current > prior){
+        prior = current;
+        current += 1;
+    }
+
+    printf("Signed: %d to ", current);
+    printf("%d\n", prior);
+    return 0;
+}
+int printUnsigned(){
+
+    unsigned int prior = 0;
+    unsigned int current = 1;
+
+    while(current > prior){
+        prior = current;
+        current += 1;
+    }
+
+    printf("Unsigned: %u to ", current);
+    printf("%u\n", prior);
+    return 0;
+}
+
+
+int main(){
+    printSigned();
+    printUnsigned();
+    int nt;
+    float ft;
+    double db;
+    short sh;
+    long ln;
+    long long int lnln;
+    long double lndb;
+    printf("Int size is %u bytes\n", sizeof(nt));
+    printf("Float size is %u bytes\n", sizeof(ft));
+    printf("Double size is %u bytes\n", sizeof(db));
+    printf("Short size is %u bytes\n", sizeof(sh));
+    printf("Long size is %u bytes\n", sizeof(ln));
+    printf("Long Long size is %u bytes\n", sizeof(lnln));
+    printf("Long Double size is %u bytes\n", sizeof(lndb));
+}
diff --git a/dsa/bst.c b/dsa/bst.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+struct Node{
+    int data;
+    struct Node* left;
+    struct Node* right;
+};
+
+struct Node* initNode(int data){
+    struct Node *node = malloc(sizeof(struct Node));
+    node->data = data;
+    node->right = NULL;
+    node->left = NULL;
+    return node;
+}
+void insert(struct Node* nd, int data){
+    if(nd->data < data){
+        if(nd->left != NULL){
+            insert(nd->left, data);
+        }
+        else{
+            struct Node* newNode = initNode(data);
+            nd->left = newNode;
+        }
+    }
+    else{
+        if(nd->right != NULL){
+            insert(nd->right, data);
+        }
+        else{
+            struct Node* newNode = initNode(data);
+            nd->right = newNode;
+        }
+    }
+}
+
+void printPostorder(struct Node* nodePtr, int isRoot){
+    if(nodePtr->left != NULL){
+        printPostorder(nodePtr->left, 0);
+    }
+    if(nodePtr->right!= NULL){
+        printPostorder(nodePtr->right, 0);
+    }
+    if(isRoot == 0){
+        printf("%d, ", nodePtr->data, 0);
+    }
+    else{
+        printf("%d", nodePtr->data);
+    }
+}
+
+
+int main(){
+
+    struct Node* root = initNode(100);
+
+    int items [] = {10 ,1,2,3,5,34,5543,435,34,543,55,345,353,345,3534,76576,846, -1};
+
+    for (int i = 0 ; items[i] != -1; ++i){
+        printf("%d", items[i]);
+        insert(root, items[i]);
+    }
+    printf("\n");
+    printPostorder(root,1);
+    printf("\n");
+
+    return 0;
+}