Programming In C Practical 22
Question 1
Write program to reverse the number 1234 using function.
Reverse.cpp
C
#include<stdio.h>
#include<conio.h>
int revfun(int num)
{
int rem,rev=0;
while(num>0)
{
rem=num%10;
rev=rev*10+rem;
num=num/10;
}
return(rev);
}
void main()
{
clrscr();
int n=1234,rev;
rev=revfun(n);
printf("\nReverse of given number is: %d",rev);
getch();
}
Output
Question 2
Find factorial of a given number using function
Fact.cpp
C
#include<stdio.h>
#include<conio.h>
int factfun(int num)
{
int fact=1;
while(num>0)
{
fact=fact*num;
num--;
}
return(fact);
}
void main()
{
clrscr();
int n,ans;
printf("\nEnter a number: ");
scanf("%d",&n);
ans=factfun(n);
printf("\nFactorial of given number is: %d",ans);
getch();
}
Output
Question 3
Create a function to find GCD of given number. Call this function in a program.
Gcd.cpp
C
#include<stdio.h>
#include<conio.h>
#include<math.h>
int gcd(int x,int y)
{
int i,small,result;
small=(x<y)?x:y;
for(i=1;i<=small;i++)
{
if(x%i==0&&y%i==0)
result=i;
}
return(result);
}
void main()
{
clrscr();
int num1,num2,ans;
printf("\nEnter a number1: ");
scanf("%d",&num1);
printf("\nEnter a number2: ");
scanf("%d",&num2);
ans=gcd(num1,num2);
printf("\nGCD of given numbers is: %d",ans);
getch();
}
Output
