Write a program to reverse a string to another string using strrev().

Source Code :

#include<stdio.h>

void main()

{

      char str1[20];

      clrscr();

      printf("\nEnter a String : ");

Write a program to copy a string to another string using strcpy().

Source Code :

#include<stdio.h>

void main()

{

      char str1[20],str2[20];

      clrscr();

      printf("\nEnter a String : ");

Write a program to combine two strings using strcat().

Source Code :

#include<stdio.h>

void main()

{

      char str1[20],str2[20];

      clrscr();

Write a program to find the length of a string using strlen().

Source Code :

#include<stdio.h>

void main()

{

      int len;

      char str[20];

Write a program to calculate sum of given 10 numbers using array.

Source Code :

#include<stdio.h>

void main()

{

      int a[10],i,sum=0;

      clrscr();

Write a program to copy the contents of one array into another in the reverse order.

Source Code :

#include<stdio.h>

void main()

{

      int a[10],b[10],i,j;

      clrscr();

      printf("\nEnter Elements : ");

25 numbers are entered from the keyboard into an array. Write a program to find out how many of them are positive, how many are negative, how many are even & how many odd.

Source Code :

#include<stdio.h>

void main()

{

      int a[25],odd=0,even=0,neg=0,pos=0,i;

      clrscr();

      printf("\nEnter 25 Elements : ");

Write a Program to take some values into an array and find the average of these array elements using pointer and user defined function

Source Code :

#include<stdio.h>

void avg(int *p)   //User Defined Function for Calculation of Average

{

      float avg=0;

      int i;

      for(i=0;i<5;i++,p++)

      {

            avg+=*p;

      }

      avg/=5;     //Calculation of Average

      printf("\n\nAverage : %5.2f",avg);  //Display Result

}