47. Nested Star-Hash Pyramid

#####*#####
####*#*####
###*###*###
##*#####*##
#*#######*#
*#########*

#include<stdio.h>
#include<conio.h>

void main()
{
int n = 5, r, c;
clrscr();

for (r = 1; r <= 6; r++, n--)
{
// first pyramid
for (c = 1; c <= n; c++)
{
printf(" #");
}

// second pyramid
for (c = 1; c <= r; c++)
{
if (c == 1)
{
printf(" *");
}
else
{
printf(" #");
}
}

// third pyramid
for (c = r; c > 1; c--)
{
if (c == 2)
{
printf(" *");
}
else
{
printf(" #");
}
}

// fourth pyramid
for (c = n; c >= 1; c--)
{
printf(" #");
}

printf("\n");
}
getch();
}
@programming_and_coding

48. Reverse star pyramid

* * * * * * * * *
* * * * * * *
* * * * *
* * *
*

#include<stdio.h>
#include<conio.h>

void main()
{
int i, j, k;
clrscr();

for (i = 5; i >= 1; i--)
{
for (j = 5; j > i; j--)
{
printf(" ");
}

for (k = 1; k < (i * 2); k++)
{
printf("* ");
}

printf("\n");
}
getch();
}
@programming_and_coding

49. Rhombus Pattern

1 1
2 2
3 3
4 4
5 5
4 4
3 3
2 2
1 1

#include<stdio.h>
#include<conio.h>

void main()
{
int num, r, c, sp, n;
clrscr();

printf("Enter the number : ");
scanf("%d", &num);

for (r = 1; r <= num; r++)
{
for (sp = num - r; sp >= 1; sp--)
printf(" ");

printf("%d", r);

for (sp = r * 2; sp > 1; sp--)
printf(" ");

printf("%d", r);
printf("\n");
}

for (r = 1, n = num - 1; r < num; r++, n--)
{
for (sp = r; sp >= 1; sp--)
printf(" ");

printf("%d", n);

for (sp = n * 2; sp > 1; sp--)
printf(" ");

printf("%d", n);
printf("\n");
}
getch();
}
@programming_and_coding

50. Square kite pattern

1
2 2
3 3
4 4
3 3
2 2
1

#include<stdio.h>
#include<conio.h>

void main()
{
int i, j, k;
clrscr();

for (i = 1; i <= 4; i++)
{
for (j = 4; j >= (i - 1) * 2 - 1; j--)
printf(" ");
printf("%d", i);
for (j = 2; j <= (i - 1) * 4; j++)
printf(" ");
if (i > 1)
printf("%d", i);
printf("\n");
}
for (i = 3; i >= 1; i--)
{
for (j = 4; j >= (i - 1) * 2 - 1; j--)
printf(" ");
printf("%d", i);
for (j = 2; j <= (i - 1) * 4; j++)
printf(" ");
if (i > 1)
printf("%d", i);
printf("\n");
}
getch();
}
@programming_and_coding

51. Triangle with only border

#include<stdio.h>
#include<conio.h>

*
* *
* *
* *
* *
* *
* * * * * *

void drawTriangle(char border, char filler, int length)
{
int start = 2;
int base = 4;
int i, sp, j, b;
for (i = start; i <= length; i++)
{
for (sp = 0; sp <= length - i; sp++)
{
printf(" ");
}
if (i > start)
{
printf("%c ", border);
}
if (i > start)
{
for (b = base; b <= i; b++)
{
printf("%c ", filler);
}
}
printf("%c \n", border);
}

for (j = base; j < length + base; j++)
{
printf("%c ", border);
}
printf("\n");
}

void main()
{
int length = 6;
clrscr();
drawTriangle('*', ' ', length);
getch();
}
@programming_and_coding

52. Program to accept number and print it's factorial.

#include<stdio.h>
#include<conio.h>
void main()
{
int i, fact=1, n;
clrscr();
printf("Enter number : ");
scanf("%d", &n);

for(i=1; i<=n; i++)
{
fact = fact*i;
}
printf("Factorial is: %d", fact);
getch();
}
@programming_and_coding

53. Program to accept number and print if it is prime number or not.

#include<stdio.h>
#include<conio.h>
void main()
{
int i, n;
clrscr();
printf("Enter number : ");
scanf("%d", &n);

for(i=2; i<=n/2; i++)
{
if(n%i==0)
{
printf("Number is not Prime");
getch();
break;
}
}
printf("Number is Prime");
getch();
}
@programming_and_coding

54. Program to print 'n' prime numbers.

#include<stdio.h>
#include<conio.h>
#include<process.h>
void main()
{
int i, j, flag=1, n;
clrscr();
printf("Enter number : ");
scanf("%d", &n);

for(i=2; i<=n; i++)
{
flag=1;
for(j=2; j<=i/2; j++)
{
if(i%j==0)
{
flag=0;
break;
}
}
if(flag==1)
printf("%d\n", i);
}
getch();
}
@programming_and_coding

55. Program to accept a number and print Fibonacci sequence.

#include<stdio.h>
#include<conio.h>
void main()
{
int pre=1, cur=1, temp, i, n;
//pre means previous number
//cur means current number
clrscr();
printf("Enter number : ");
scanf("%d", &n);
printf("%d\t%d", pre, cur);

for(i=3; i<=n; i++)
{
temp = cur;
cur = pre + cur;
pre = temp;
printf("\t%d", cur);
}
getch();
}
@programming_and_coding

56. Add 'n' numbers.

#include<stdio.h>
#include<conio.h>
void main()
{
int n, sum=0, i, value;
clrscr();

printf("Enter total numbers you want to add : ");
scanf("%d", &n);

for (i=1; i<=n; i++)
{
printf("Enter number %d : ", i);
scanf("%d", &value);
sum = sum + value;
}

printf("Sum of entered numbers : %d", sum);
getch();
}
@programming_and_coding

57. Add 'n' numbers using array.

#include<stdio.h>
#include<conio.h>
void main()
{
int n, sum = 0, i, array[100];
clrscr();
printf("Enter total numbers you want to add : ");
scanf("%d", &n);

for (i = 1; i <= n; i++)
{
printf("Enter number %d : ", i);
scanf("%d", &array[i]);
sum = sum + array[i];
}
printf("Sum : %d\n", sum);
getch();
}
@programming_and_coding

58. Program to accept a number and add the digits of that number.

#include<stdio.h>
#include<conio.h>
void main()
{
int n, sum = 0, remainder;
clrscr();

printf("Enter the number : ");
scanf("%d", &n);

while (n != 0)
{
remainder = n % 10;
sum = sum + remainder;
n = n / 10;
}

printf("Sum of digits of entered number : %d", sum);
getch();
}
@programming_and_coding

59. Program to accept a number and add the digits of that number using recursion.

#include<stdio.h>
#include<conio.h>

int add_digits(int);

void main()
{
int n, result;
clrscr();
printf("Enter a number : ");
scanf("%d", &n);

result = add_digits(n);

printf("Sum : %d", result);
getch();
}

int add_digits(int n)
{
static int sum = 0;
if (n == 0)
{
return 0;
}
sum = n % 10 + add_digits(n / 10);
return sum;
}
@programming_and_coding

60. Average of numbers.

#include<stdio.h>
#include<conio.h>
void main()
{
int n, i;
float sum=0, x, avg;
clrscr();
printf("Enter total Numbers : ");
scanf("%d", &n);
for (i = 1; i <= n; i++)
{
printf("\nNumber %d : ", i );
scanf("%f", &x);
sum += x;
}
avg = sum / n;
printf("\nThe Average is : %0.2f", avg);
getch();
}
@programming_and_coding

61. Program to calculate Square of 'n' numbers.

#include<stdio.h>
#include<conio.h>
void main()
{
int n, r, i, sqr=0;
clrscr();
printf("\nEnter the range : ");
scanf("%d", &r);

for (i = 1; i <= r; i++)
{
n = i;
sqr = n * n;
printf("\nSquare of %d is : %d .", n, sqr);
}
getch();
}
@programming_and_coding

62. Program to take an alphabet from user and check whether it is a vowel or not.

#include<stdio.h>
#include<conio.h>
void main()
{
char ch;
clrscr();
printf("Enter an alphabet : ");
scanf("%c", &ch);

if (ch=='a' || ch=='A' || ch=='e' || ch=='E' || ch=='i' || ch=='I' || ch=='o' || ch=='O' || ch=='u' || ch=='U')
printf("%c is a vowel.", ch);
else
printf("%c is not a vowel.", ch);
getch();
}
@programming_and_coding

63. Program to take two numbers and check whether they are amicable numbers or not.

#include<stdio.h>
#include<conio.h>

//check function
int check(int a, int b)
{
int s = 0, i;
for (i = 1; i < a; i++)
{
if (a % i == 0)
{
s = s + i;
}
}

if (s == b)
{
s = 0;
for (i = 1; i < b; i++)
{
if (b % i == 0)
{
s = s + i;
}
}

if (s == a)
return 1;
else
return 0;
}
return 0;
}

void main()
{
int a, b;
clrscr();
printf("Enter 1st number : ");
scanf("%d", &a);
printf("Enter 2nd number : ");
scanf("%d", &b);

if (check(a, b))
{
printf("\n%d and %d are Amicable Numbers.", a, b);
}
else
{
printf("\n%d and %d are not Amicable Numbers.", a, b);
}
}
@programming_and_coding

64. Program to accept a number and print the factors of that number.

#include<stdio.h>
#include<conio.h>
void main()
{
int n, i;
clrscr();
printf("Enter a number : ");
scanf("%d", &n);
printf("Factors of %d are : ", n);
for (i = 1; i <= n; ++i)
{
if (n % i == 0)
printf("\n%d ", i);
}
getch();
}
@programming_and_coding

65. Program to accept two integer numbers and print the GCD(Greatest Common Divisor).

#include<stdio.h>
#include<conio.h>
void main()
{
int x, y, m, i;
clrscr();
printf("Enter 1st number : ");
scanf("%d", &x);
printf("Enter 2nd number : ");
scanf("%d", &y);

if (x > y)
m = y;
else
m = x;

for (i = m; i >= 1; i--)
{
if (x % i == 0 && y % i == 0)
{
printf("GCD of two number is : %d", i);
break;
}
}
getch();
}
@programming_and_coding

66. Program to find power of number.

#include<stdio.h>
#include<conio.h>
void main()
{
int base, expo;
int value = 1;
clrscr();
printf("Enter base number : ");
scanf("%d", &base);
printf("Enter exponent number : ");
scanf("%d", &expo);

while (expo != 0)
{
// value = value * base;
value *= base;
--expo;
}
printf("Answer : %d", value);
getch();
}
@programming_and_coding