How to change the colors of folders?

Creating Folders Having Different Colors In Windows:

Windows doesn't allow us to create the colored folders by default. Hence we have to install a folder colorizer in our Windows to make it happen.

1. Download the folder colorizer setup file from here.

2. Install the downloaded setup file. If it asks to install the Microsoft .Net Framework, then install that too.

3. After the successful installation, you can now proceed to add colors to the folders of you PC.

4. Right click any folder to which you want to add color.

5. Select "Colorize!" option and then select the color you want to add.

6. Now refresh (F5) your computer to see the instant effect.

Enjoy! :)

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Program to find the sum of the series 0.9, 0.99, 0.999, 0.9999, ..........

Problem:

WAP to display the series 0.9, 0.99, 0.999, 0.9999, .......... and also find the sum of the series.

Source Code:

/*to find the sum of the series 0.9, 0.99, 0.999, 0.9999, ..........*/
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main()
{
    int i, n;
    double j=0, sum=0;
    printf("Enter the length of the series: ");
    scanf("%d", &n);
    printf("The series is\n");
    for(i = 1; i <= n; i++)
    {
        j += 0.9/pow(10, i-1);
        printf("%f, ", j);
        sum += j;
    }
    printf("\nSum of  the series is %f", sum);
    system ("pause");
    return 0;
}

Sample Run:

Enter the length of the series: 5

The series is

0.900000, 0.990000, 0.999000, 0.999900, 0.999990,

Sum of  the series is 4.888890

Program to decide the type of a triangle.

Problem:

Given the lengths of three sides of a triangle. Write a program in C which decides the type (Right Angled, Acute, Obtuse, Isosceles, Scalene, Equilateral etc.) of the triangle.

Source Code:

/*to decide the type of triangle*/
#include <stdio.h>
#include <stdlib.h>
int main()
{
    float a,b,c;
    printf("Enter the length of three sides of a triangle: ");
    scanf("%f%f%f",&a,&b,&c);
    if(a > b + c || b > c + a || c > a+b)
    {
        printf("This is not a triangle.");
        system ("pause");
        exit(0);
    }
    else if( a == b && b == c && c == a)
        printf("This is an equilateral triangle.");
    else if(a==b || b==c || c==a)
        printf("This is an isosceles triangle.");
    else if(a*a == b*b + c*c || b*b == c*c + a*a || c*c == a*a + b*b)
        printf("This is a right angled triangle.");
    else if(a*a > b*b + c*c || b*b > c*c + a*a || c*c > a*a + b*b)
        printf("This is an obtuse angled triangle.");
    else if(a*a < b*b + c*c || b*b < c*c + a*a || c*c < a*a + b*b)
        printf("This is an acute angled triangle.");
    else
        printf("This is a scalene triangle.");
    system ("pause");
    return 0;
}

Sample Output:

Enter the length of three sides of a triangle: 5 6 7

This is an acute angled triangle.

Program to display the number in reverse order.

Problem:

WAP to read four digit number and display the number in reverse order.

Source Code:

/*to display the numbers in reverse order*/
#include<stdio.h>
int main()
{
int n;
printf("Enter a four digit number: ");
scanf("%d", &n);
 printf("The number in reverse order is ");
printf("%d", n %10);
n = n/10;
printf("%d", n %10);
n = n/10;
printf("%d", n %10);
n = n/10;
printf("%d", n %10);
return 0;
}

Sample Run:

Enter a four digit number: 1234

The number in reverse order is 4321

Program to find net salary

Problem:

WAP to read basic salary. Apart from basic salary, allowances are given as follows
a. TA (Travelling Allowance) is 5% of basic salary
b. DA (Daily Allowance) is 3% of basic salary
c. HRA (House Rate Allowance) is 8% of basic salary
Also, tax is witheld 1% of basic salary.
Finally, calculate the net salary

Source Code:

/*to find net salary*/
#include<stdio.h>
int main()
{
float bs, ta, hra, da, tax, ns;
printf("Enter the amount of basic salary: ");
scanf("%f", &bs);
ta = 0.05 * bs;
da = 0.03 * bs;
hra = 0.08 * bs;
tax = 0.01 * bs;
ns = bs + ta + da + hra - tax;
printf("Travelling Allowance = %f", ta);
printf("\nDaily Allowance = %f", da);
printf("\nHome Rate Allowance = %f", hra);
printf("\nTax = %f", tax);
printf("\nNet Salary = %f", ns);
return 0;
}

Sample Run:

Enter the amount of basic salary: 50000

Travelling Allowance = 2500.00

Daily Allowance = 1500.00

Home Rate Allowance = 4000.00

Tax = 500.00

Net Salary = 57500.00

To find total price paid by a customer

Problem:

WAP to read price of three items. Apart from normal cost, a customer has to pay 13% VAT and 10% service charge. Finally, calculate the total price paid by the customer.

Source Code:

/*to find total price*/
#include<stdio.h>
int main()
{
float nc1, nc2, nc3, nc, vat, sc, tp;
printf("Enter normal cost of first item: ");
scanf("%f", &nc1);
printf("Enter normal cost of second item: ");
scanf("%f", &nc2);
printf("Enter normal cost of third item: ");
scanf("%f", &nc3);
nc = nc1 + nc2 + nc3;
vat = 0.13 * nc;
sc = 0.10 * nc;
tp = nc + vat + sc;
printf("Total net cost = %f", nc);
printf("\nVat = %f", vat);
printf("\nService charge = %f", sc);
printf("\nTotal price = %f", tp);
return 0;
}

Sample Run:

Enter normal cost of first item: 3000

Enter normal cost of second item: 4500

Enter normal cost of third item: 6000

Total net cost = 13500.00

Vat = 1755.00

Service charge = 135.00

Total price = 15390.00

Program to read marks in five subjects and calculate the total and percentage

Source Code:

/*to find the total and percentage of an examination*/
#include<stdio.h>
int main()
{
int s1, s2, s3, s4, s5, tot;
float per;
printf("Enter the marks of 5 subjects: ");
scanf("%d %d %d %d %d", &s1, &s2, &s3, &s4, &s5);
tot = s1 + s2 + s3 + s4 + s5;
per = tot / 500.0 * 100;
printf("Total = %d", tot);
printf("\nPercentage = %f", per);
return 0;
}

Sample Run:

Enter the marks of 5 subjects: 90 89 88 87 86

Total = 440

Percentage = 88.00