added more codes

Author: Lavin-tom

Strings/find_most_frequent_character_from_a_string.c

@@ -0,0 +1,34 @@
+//find the most frequent character from a string
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+#define length 10
+int main()
+{
+    char *word = (char*)malloc(length*sizeof(char));
+    printf("enter word\n");
+    scanf("%s",word);
+
+    int frequency = 0,  count =0;
+    char freqChar;
+    int wordlength = strlen(word);
+    for(int i=0;i<wordlength;i++)
+    {
+        count = 0;
+        for(int j=0;j<wordlength;j++)
+        {
+            if(i!=j && word[i]==word[j])
+            {
+                count++;
+            }
+            if(count > frequency)
+            {
+                freqChar = word[i];
+                frequency = count;
+            }
+        }
+    }
+    printf("frequent :%c",freqChar);
+    free(word);
+}

coding_challenge/get_data_and_sort_based_on_user_input.c

@@ -0,0 +1,77 @@
+//get data and sort based on user input
+
+#include<stdio.h>
+#include<stdlib.h>
+
+#define max 20
+static int len = 0;
+int data;
+void sortArray(int arr[],int option)
+{
+    for(int i=0;i<len;i++)
+    {
+        for(int j=i;j<len;j++)
+        {
+            switch(option)
+            {
+            case 1:
+                if(arr[i]>arr[j])
+                {
+                    arr[i] = arr[i]+arr[j];
+                    arr[j] = arr[i]-arr[j];
+                    arr[i] = arr[i]-arr[j];
+                }
+                break;
+            case 2:
+                 if(arr[i]<arr[j])
+                {
+                    arr[i] = arr[i]+arr[j];
+                    arr[j] = arr[i]-arr[j];
+                    arr[i] = arr[i]-arr[j];
+                }
+                break;
+            }
+        }
+    }
+}
+void setArray(int arr[])
+{
+    printf("Enter data..add zero to close\n");
+    scanf("%d",&data);
+        if(data!=0)
+        {
+            arr[len]= data;
+            len++;
+            setArray(arr);
+        }
+}
+void getArray(int arr[])
+{
+    for(int i=0;i<len;i++)
+    {
+        printf("%d ",arr[i]);
+    }
+    printf("\n");
+}
+int main()
+{
+    int option;
+    int *arr = (int*)malloc(max*sizeof(int));
+    setArray(arr);
+    getArray(arr);
+    printf("Array created\n1.Accending order\n2.Decending order\n");
+    scanf("%d",&option);
+    switch (option)
+    {
+    case 1:
+            sortArray(arr,option);
+        break;
+    case 2:
+            sortArray(arr,option);
+            break;
+    default:
+        break;
+    }
+    getArray(arr);
+    free(arr);
+}

functions/arkamans_functions.c

@@ -0,0 +1,32 @@
+//arkamans_functions
+//for theory - https://www.geeksforgeeks.org/ackermann-function/
+
+#include<stdio.h>
+int arkamansFun(int m,int n)
+{
+    if(m == 0)
+    {
+        return n+1;
+    }
+    if(m > 0 && n == 0)
+    {
+        return arkamansFun(m-1,1);
+    }
+    if(m > 0 && n > 0)
+    {
+        return arkamansFun(m-1,arkamansFun(m,n-1));
+    }
+}
+int main()
+{
+    int m,n,res;
+    printf("enter m and n\n");
+    scanf("%d %d",&m,&n);
+    if(m >= 0 && n >= 0)
+    {
+        res = arkamansFun(m,n);
+        printf("A(%d,%d) = %d",m,n,res);
+    }
+    else
+        printf("m and n should be non negative no\n");
+}

macros/macros_with_arguments/basics_macros.c

@@ -0,0 +1,12 @@
+//basics of macros
+
+#include<stdio.h>
+typedef unsigned int uint8;
+#define FLT_L_HS_A  ((uint8)0x80)   //hexadecimal value typecasted into unsigned int and store it into FLT_L_HS_A
+#define FLT_L_HS_B  ((float)0x80)
+int main()
+{
+    printf("%d\n",FLT_L_HS_A);   
+    printf("%f\n",FLT_L_HS_B); 
+    printf("%x\n",0x80);
+}

storage_class/static/static_storage_class.c

@@ -0,0 +1,27 @@
+//static storage class
+//static global means we can't use that variable outside the pgrm with extern command
+//for a normal global varialbe we can access other pgrm but by using static we can't
+
+#include<stdio.h>
+static int j = 0;                   //static global variable
+void globalFunctionCall(void)
+{
+    j++;
+    printf("%d ",j);
+    if(j<5)
+        globalFunctionCall();
+}
+void staticFunctionCall(void)
+{
+    static int i = 0;
+    i++;
+    printf("%d ",i);
+    if(i<5)
+        staticFunctionCall();
+}
+int main()
+{
+    staticFunctionCall();
+    printf("\n");
+    globalFunctionCall();
+}