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C Language Programs for beginners-1

Control Statements programs:
1 Program to Find Largest of Three Numbers
#include <stdio.h>
#include<conio.h>
void main()
{
int a, b, c;
clrscr();
printf("\nEnter three numbers: ");
scanf("%d %d %d", &a, &b, &c);
if (a>b && a>c)
printf("\n\n%d is greater", a);
else if (b>a && b>c)
printf("\n\n%d is greater", b);
else
printf("\n\n%d is greater", c);
getch();
}
2 Program to Check Whether a Character is Vowel or not by using switch Statement
#include<conio.h>
#include<stdio.h>
void main()
{
char ch;
clrscr();
printf("\nEnter any character: ");
scanf("%c", &ch);
switch (ch)
{
case 'a':
case 'A':
printf("\n\n%c is a vowel", ch);
break;
case 'e':
case 'E':
printf("\n\n%c is a vowel", ch);
break;
case 'i':
case 'I':
printf("\n\n%c is a vowel", ch);
break;
case 'o':
case 'O':
printf("\n\n%c is a vowel", ch);
break;
case 'u':
case 'U':
printf("\n\n%c is a vowel", ch);
break;
default:
printf("\n\n%c is not a vowel", ch);
}
getch();
}
3 Program to Find the Sum of First 100 Positive Integers
#include<conio.h>
#include<stdio.h>
void main()
{
int i, sum=0;
clrscr();
printf("\n\tSum of first 100 positive numbers\n");
for(i=0; i<=100; i++)
sum = sum + i;
printf("\nSum = %d", sum);
getch();
}
4 Program to Find the Sum of Even and Odd Numbers from First 100 Positive Integers
#include<conio.h>
#include<stdio.h>
void main()
{
int i, sumEven=0, sumOdd=0;
clrscr();
for (i=0; i<=100; i++)
if (i%2 == 0)
sumEven = sumEven + i;
else
sumOdd = sumOdd + i;
printf("\nSum of first even 100 numbers: %d\n", sumEven);
printf("\nSum of first odd 100 numbers: %d\n", sumOdd);
getch();
}
5 Program to Find the Sum of Digits of a Positive Integer
#include<conio.h>
#include<stdio.h>
void main()
{
long n;
int digit, sum = 0;
clrscr();
printf("\nEnter any number: ");
scanf("%d", &n);
while (n > 0)
{
digit = n%10;
n = n/10;
sum = sum + digit;
}
printf("\n\nSum of digits: %d", sum);
getch();
}
6 Program to Reverse a Given Number
#include<conio.h>
#include<stdio.h>
void main()
{
long n;
int rev;
clrscr();
printf("\nEnter any number: ");
scanf("%ld", &n);
printf("\nReverse no. is:\n\n");
while (n > 0)
{
rev = n % 10;
n = n / 10;
printf("%d", rev);
}
getch();
}
7 Program to Print First N Prime Numbers
#include<conio.h>
#include<stdio.h>
void main()
{
         int i, j, n;
        clrscr();
        printf("\nEnter how many prime numbers you want to print: ");
        scanf("%d", &n);
        printf("\n");
         for (i=2; i<=n; i++){
             for (j=2; j<=i; j++)
            {
                    if(i%j == 0)
                   break;
                   else
                  {
                                 printf("\n%d", i);
                                 break;
                  }
           }
}
getch();
}
8 Program to Print a Table of any Number
#include<conio.h>
#include<stdio.h>
void main()
{
int n, mul, i;
clrscr();
printf("\nEnter any no.: ");
scanf("%d", &n);
for(i=1; i<=10; i++)
{
mul = n*i;
printf("\n\n%d\tx\t%d\t=\t%d", n, i, mul);
}
getch();
}
9 Program to Check Whether the Given Number is an Armstrong Number
#include<conio.h>
#include<stdio.h>
void main()
{
int n, temp, d, arm=0;
clrscr();
printf("\nEnter any number: ");
scanf("%d", &n);
temp = n;
while (temp > 0)
{
d = temp%10;
temp = temp/10;
arm = arm + (d*d*d);
}
if (arm == n)
printf("\n\n%d is an Armstrong number\n", n);
else
printf("\n\n%d is not an Armstrong number\n", n);
getch();
}
10 Program to Print the Numbers Which are Divisible by 3 and 5 from First 100 Natural Numbers
#include<conio.h>
#include<stdio.h>
void main()
{
int i;
clrscr();
printf("\nFirst 100 numbers which are divisible by 3 and
5\n\n");
for (i=1; i<=100; i++)
if (i%3==0 && i%5==0)
printf("\t%d", i);
getch();
}
11 Program to Find Whether a Number is Palindrome or Not
#include<conio.h>
#include<stdio.h>
void main()
{
int n, pal=0, temp, x;
clrscr();
printf("\nEnter any number: ");
scanf("%d", &n);
temp = n;
while (temp > 0)
{
x = temp%10;
temp = temp/10;
pal = pal*10 + x;
}
if (pal == n)
printf("\n%d is palindrome", n);
else
printf("\n%d is not palindrome", n);
getch();
}
12 Program to Find Factorial of a Number without using Recursion
#include<conio.h>
#include<stdio.h>
void main()
{
int n, i;
long fact=1;
clrscr();
printf("\nEnter any number: ");
scanf("%d", &n);
for (i=1; i<=n; i++)
fact = fact*i;
printf("\nFactorial = %ld", fact);
getch();
}
13 Program to Find Factorial of a Number using Recursion
#include<conio.h>
#include<stdio.h>
int fact(int num)
{
        int f;
        if(num==1)
        return 1;
        else
        f=num*fact(num-1);
        return f;
}
void main()
{
      int num,res;
      clrscr();
      printf(“\nEnter any number:”);
      scanf(“%d”,&num);
      res=fact(num);
      printf(“\nFatorial=%d”,res);
      getch();
     }
14 Program to Print Fibonacci Series without Recursion
#include<conio.h>
#include<stdio.h>
void main()
{
int x, y, z, n, i;
clrscr();
x=0; y=1;
printf("\nEnter value of n: ");
scanf("%d", &n);
printf("\nFibonacci Series:\n\n");
printf("\n%d", x);
printf("\t%d", y);
for( i=0; i<n-2; i++)
{
z = x+y;
printf("\t%d", z);
x = y;
y = z;
}
getch();
}
15 Program to Print Fibonacci Series using Recursion

#include<conio.h>
#include<stdio.h>
int fibbo(int, int, int, int);
void main()
{
int n, f, x=0, y=1, i=3;
clrscr();
printf("\nEnter value of n: ");
scanf("%d", &n);
printf("\n%d\t%d", x, y);
fibbo(x, y, n, i);
getch();
}
fibbo(int x, int y, int n, int i)
{
int z;
if (i <= n)
{
z = x + y;
printf("\t%d", z);
x = y;
y = z;
i++;
fibbo(x,y,n,i);
}
}
16 Program to Find Value of sinx using Expansion Series given below:
sin(x) = x - x3/3 + x5/5 - x7/7......

#include<conio.h>
#include<stdio.h>
#include<math.h>
void main()
{
float base, pwr, sum, c=1, m=2, i=3, g, h;
clrscr();
printf("\nEnter the base value: ");
scanf("%f", &base);
printf("\nEnter the power value: ");
scanf("%f", &pwr);
sum = base;
ab:
m = m * i;
h = pow(-1, c);
g = pow(base, i);
sum = sum + (h * g) / m;
i = i + 2;
c++;
m = m * (i - 1);
if (i <= pwr)
goto ab;
printf("\n\nSum = %f", sum);
getch();}
17 Program to Print the Pattern:
1
121
12321
1234321
123454321
12345654321
1234567654321
123456787654321
12345678987654321
#include<conio.h>
#include<stdio.h>
void main()
{
int i, j, k, space, n=9;
clrscr();
for (i=1; i<=n; i++)
{
for (j=1; j<=n-i; j++)
putchar(' ');
for (j=1,k=2*i-1; j<=2*i-1; j++,k--)
{
if (j <= k)
printf("%d", j);
else
printf("%d", k);
}
putchar('\n');
}
getch();
}
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