The C program contains code to calculate the sum of a series. It defines a function called "sum" that takes an integer "x" and integer "n" as parameters. The function calculates the sum from 1 to n of x raised to the power of i divided by i. In main, it calls the sum function with x=2 and n=5 and prints the result.

1. Submitted to
Tanjina Alamgir
Lecturer,
Dept. of Computer Science
Southern University

2. Source:
// C program to get the sum of the series
#include <math.h>
#include <stdio.h>
// Function to get the series
double Series(double x, int n)
{
double sum = 1, term = 1, fct, j, y = 2, m;
// Sum of n-1 terms starting from 2nd term
int i;
for (i = 1; i < n; i++) {
fct = 1;
for (j = 1; j <= y; j++) {
fct = fct * j;
}
term = term * (-1);
m = term * pow(x, y) / fct;
sum = sum + m;
y += 2;
}
return sum;
}
// Driver Code
int main()
{
double x = 9;
int n = 10;
printf("%.4f", Series(x, n));
return 0;
}

3. Here is the code preview and output view

4. Source:
#include <stdio.h>
int main()
{
int i, j, rows;
printf("Enter number of rows: ");
scanf("%d",&rows);
for(i=1; i<=rows; ++i)
{
for(j=1; j<=i; ++j)
{
printf("S ");
}
printf("n");
}
return 0;
}

6. Source :
#include <stdio.h>
void main()
{
int array[100], i, num;
printf("Enter the size of an array n");
scanf("%d", &num);
printf("Enter the elements of the array n");
for (i = 0; i < num; i++)
{
scanf("%d", &array[i]);
}
printf("Even numbers in the array are - ");
for (i = 0; i < num; i++)
{
if (array[i] % 2 == 0)
{
printf("%d t", array[i]);
}
}
}

8. Source:
#include <stdio.h>
int main()
{
int c, n, fact = 1;
printf("Enter a number to calculate its factorialn");
scanf("%d", &n);
for (c = 1; c <= n; c++)
fact = fact * c;
printf("Factorial of %d = %dn", n, fact);
return 0;
}

10. Source:
#include <stdio.h>
int main()
{
int num1, num2;
//Reading two numbers from user
printf("Enter two numbers to find smallest number: ");
scanf("%d%d", &num1, &num2);
//Condition to check smallest number
switch(num1 < num2)
{
case 0: printf("%d is smallest number", num2);
break;
case 1: printf("%d is smallest number", num1);
break;
}
return 0;
}

12. Source :
// C program to calculate the following series
#include <math.h>
#include <stdio.h>
// Function to calculate the following series
double Series(int n)
{
int i;
double sums = 0.0, ser;
for (i = 1; i <= n; ++i) {
ser = 1 / pow(i, i);
sums += ser;
}
return sums;
}
// Driver Code
int main()
{
int n = 3;
double res = Series(n);
printf("%.5f", res);
return 0;
}

14. Source :
#include <stdio.h>
int main()
{
int i,arr[10],sum=0;
printf("Enter 10 elements:");
for(i=0;i<10;++i)
scanf("%d",&arr[i]);
for(i=0;i<10;++i)
sum=sum+arr[i];
printf("Sum of numbers is:%d",sum);
return 0;
}

16. Source:
#include <stdio.h>
#include <math.h>
int main()
{
int x,n;
int result;
printf("Enter the value of base: ");
scanf("%d",&x);
printf("Enter the value of power: ");
scanf("%d",&n);
result =pow((double)x,n);
printf("%d to the power of %d is= %d", x,n, result);
getch();
return 0;
}

18. Source:
#include <stdio.h>
int main()
{
int x, y, t;
printf("Enter two integersn");
scanf("%d%d", &x, &y);
printf("Before SwappingnFirst integer = %dnSecond integer = %dn", x, y);
t = x;
x = y;
y = t;
printf("After SwappingnFirst integer = %dnSecond integer = %dn", x, y);
return 0;
}

20. Source:
#include<stdio.h>
{
Int array[100},I,num;
Printf(“Enter the size of an array n”)
Scanf(“%d”, &num);
Printf(“Enter the elements of the array”)
For(i=0; 1<num; i++)
{scanf(“%d”,&array[i]);
Printf(“n odd numbers in the array are=”);
For(i=0; i<num; i++ {
If(array[i] %2 !=0){
Printf (“%dt”,arrai[i]);}
}
}

22. Source:
/* C program to Print Square Star Pattern */
#include<stdio.h>
int main()
{
int i, j, Side;
printf("Please Enter Any Side of a Squaren");
scanf("%d", &Side);
for(i = 0; i < Side; i++)
{
for(j = 0; j < Side; j++)
{
printf("S");
}
printf("n");
}
return 0;
}

24. Source:
#include <stdio.h>
int main()
{
int num1, num2;
//Reading two numbers from user
printf("Enter two numbers to find smallest number: ");
scanf("%d%d", &num1, &num2);
//Condition to check smallest number
switch(num1 < num2)
{
case 0: printf("%d is smallest number", num2);
break;
case 1: printf("%d is smallest number", num1);
break;
}
return 0;
}

26. Source:
// C program to find sum of series
// 1 + x/1 + x^2/2 + x^3/3 + ....+ x^n/n
#include <math.h>
#include <stdio.h>
double sum(int x, int n)
{
double i, total = 1.0;
for (i = 1; i <= n; i++)
total = total +
(pow(x, i) / i);
return total;
}
// Driver code
int main()
{
int x = 2;
int n = 5;
printf("%.2f", sum(x, n));
return 0;
}