Selection, Bubble, Insertion Sort in Java

import java.util.Arrays;

public class SortingDemo {
    public static void main(String... args){
            int a[]={2,1,3,5,4,8,7,9,6};
            System.out.println("Before Sorting :"+ Arrays.toString(a));
            insertionSort(a);
            System.out.println("After Sorting :"+ Arrays.toString(a));
    }
    public static void selectionSort(int... arr){
            for(int i=0;i<arr.length-1;i++){
                    for(int j=i+1;j<arr.length;j++){
                        if(arr[i]>arr[j]){
                            int temp=arr[i];
                            arr[i]=arr[j];
                            arr[j]=temp;
                        }

                    }
            }
    }
    public static void bubbleSort(int... a){
            for(int i=0;i<a.length;i++){
                for(int j=0;j<a.length-i-1;j++){
                    if(a[j]>a[j+1]){
                        int temp=a[j];
                        a[j]=a[j+1];
                        a[j+1]=temp;
                    }
                }
            }
    }
    public static void insertionSort(int... arr){
            for(int i=1;i<arr.length;i++){
                int j=i-1;
                int temp=arr[i];
                while(j>=0 && temp<arr[j]){
                    arr[j+1]=arr[j];
                    j--;
                }
                arr[j+1]=temp;
            }
    }
}

Selection Sort

 #include<stdio.h>  
 #include<conio.h>  
 void showElements(int arr[],int n){  
      int i;  
      if(n==0)  
           printf("[]");  
      else if(n>0)  
           printf("[");  
      for(i=0;i<n;i++){  
           if(i==n-1){  
                printf("%d",arr[i]);  
                printf("]");  
           }else  
                printf("%d,",arr[i]);  
      }  
 }  
 void sortData(int arr[],int n){  
      int i,j,temp;  
      for(i=0;i<n-1;i++){  
           for(j=i+1;j<n;j++){  
                if(arr[i]>arr[j]){  
                  temp=arr[i];  
                  arr[i]=arr[j];  
                  arr[j]=temp;  
                }  
           }  
      }  
 }  
 int getLength(int arr[]){  
      int i=0;  
      while(arr[i]!='\0'){  
        i++;  
      }  
      return i;  
 }  
 void main(){  
      int arr[]={2,1,3,4,9,8,7,6,5};  
      int i,j,len;  
      clrscr();  
      len=getLength(arr);  
      printf("\n Before Sorting Array Elements \n");  
      showElements(arr,len);  
      sortData(arr,len);  
      printf("\n After Sorting Array Elements \n");  
      showElements(arr,len);  
      getch();  
 }  

Floating point error in c - struct

 //Link float error solution  
 #include<stdio.h>  
 #include<conio.h>  
 struct Employee{  
      int empno;  
      char name[50];  
      float salary;  
 };  
 void floatError(float *a){  
      float b=*a;  
      floatError(&b);  
 }  
 void showDetails(struct Employee *emp){  
      printf("\n %d  %s %f",emp->empno,emp->name,emp->salary);  
 }  
 void main(){  
      struct Employee e1;  
      struct Employee e2;  
      clrscr();  
      e1.empno=1001;  
      strcpy(e1.name,"Krishna G");  
      e1.salary=29999.879;  
      e2.empno=1002;  
      strcpy(e2.name,"Nanda Gopal Krishna");  
      e2.salary=59999.987;  
      showDetails(&e1);  
      showDetails(&e2);  
      getch();  
 }  

Stack in C - using array implementation

 //Stack implementation using arrays  
 #include<stdio.h>  
 #include<conio.h>  
 int max=10;  
 int stack[10];  
 int top=-1;  
 int i;  
 void push(int ele){  
   if(top<max){  
      stack[++top]=ele;  
      printf("\n The element is added to stack %d",ele);  
   }else{  
      printf("\n Stack is overflow");  
   }  
 }  
 void pop(){  
      if(top==-1){  
           printf("\n Stack is underflow");  
      }else{  
           printf("\n Element %d is removed ",stack[top]);  
           top--;  
      }  
 }  
 void display(){  
     if(top==-1){  
           printf("\n Stack is empty");  
     }else{  
       printf("[");  
       for(i=0;i<=top;i++){  
           printf(" %d ",stack[i]);  
           if(i<top)  
           printf(",");  
       }  
       printf("]");  
     }  
 }  
 void main(){  
    int ch,ele;  
    int choice=1;  
    clrscr();  
    while(choice){  
       printf("\n1.PUSH 2.POP 3.DISPLAY\n ");  
       scanf("%d",&ch);  
       switch(ch){  
           case 1:printf("\n Enter the element to push \n");  
               scanf("%d",&ele);  
               push(ele);  
               break;  
           case 2:pop();  
               break;  
           case 3:display();  
               break;  
           default: printf("\n Enter valid number (1 to 3)\n");  
       }  
       printf("\n Do you want to continue (yes = 1 no = 0) \n");  
       scanf("%d",&choice);  
    }  
 }