Pointers

  #include<stdio.h>
  int sum(int *p,int n)
  {
    int s=0,i;
    for(i=0;i<n;i++)
    {
        s=s+*p;
        p++;
    }
    return s;
  }
  void main()
  {
    int arr[10]={7,3,11,4,8,2,6,0,1,5};
    int z;
    z=sum(arr,5);
    printf("Sum is %d",z);
  }

  #include<stdio.h>
  float mean(int *p,int n)
  {
    int i;
    float m,s=0;
    for(i=0;i<n;i++)
    {
        s=s+ *p;
        p++;
    }
    m=s/n;
    return m;
  }
  void main()
  {
    int arr[10]={7,3,11,4,8,2,6,0,1,5};
    float z;
    z=mean(arr,5);
    printf("Mean is %f",z);
  }

  #include<stdio.h>
  int count(int *p,int n)
  {
    int i,c=0;
    for(i=0;i<n;i++)
    {
        if(*p%2 == 0 )
            c=c+1;
        p++;
    }
    return c;
  }
  void main()
  {
    int arr[10]={7,3,11,4,8,2,6,0,1,5};
    int z;
    z=count(arr,5);
    printf("Total Even nos are %d",z);
  }

  #include<stdio.h>
  int max(int *p,int n)
  {
    int i,g;
    g=*p;
    for(i=0;i<n-1;i++)
    {
        p++;
        if(*p>g)
            g=*p;
    }
    return g;
  }
  void main()
  {
    int arr[10]={7,13,51,44,28,52,16,0,21,5};
    int z;
    z=max( arr,5);
    printf("Greatest No is %d",z);
  }

  #include<stdio.h>
  int length(char *p)
  {
    int c=0;
    while(*p!='\0')
    { 
        c=c+1;
        p++;
    }
    return c;
  }
  void main()
  {
    char arr[50];
    int z;
    printf("Enter a String ");
    gets(arr);
    z=length(arr);
    printf("Length is %d ",z);
  }

  #include<stdio.h>
  int count(char *p)
  {
    int c=0;
    while(*p!='\0')
    { 
        if(*p==' ')
            c++;
        p++;
    }
    return c+1;
  }
  void main()
  {
    char arr[50];
    int z;
    printf("Enter a String ");
    gets(arr);
    z=count(arr);
    printf("Total Words are %d ",z);
  }

  #include<stdio.h>
  void reverse(char *p)
  { 
    char *q;
    q=p;
    while(*q!='\0')
        q++;
    q=q-1; 
    while(p<q)
    { 
        char temp;
        temp=*p;
        *p=*q;
        *q=temp;
        p++;
        q--;
    }
  }
  void main()
  {
    char arr[50];
    printf("Enter a String ");
    gets(arr);
    reverse(arr);
    printf("Result is %s ",arr);
  }

#include<stdio.h>
  void copy(char *q,char *p)
  { 
    while(*p!='\0')
    { 
        *q=*p;
        p++;
        q++;
    }
    *q='\0';
  }
  void main()
  {
    char a[10]="seeta";
    char b[10] ;
    copy(b,a);
    printf("Result is %s ",b);
  }

  #include<stdio.h>
  void join(char *p , char *q)
  { 
    while(*p!='\0')
        p++;
    while(*q!='\0')
    { 
        *p=*q;
        p++;
        q++;
    }
    *p ='\0';
    }
  void main()
  {
    char a[10]="seeta";
    char b[10]="ram";
    join(a,b);
    printf("Result is %s ",a); 
  }