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 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

Program to read principle, time and rate and calculate simple interest

Source Code:

/*to find the simple interest*/
#include<stdio.h>
int main()
{
float p, t, r, si;
printf("Enter the value of principle: ");
scanf("%f", &p);
printf("Enter the time (in years): ");
scanf("%f", &t);
printf("Enter the interest rate: ");
scanf("%f", &r);
si = (p * t * r) / 100;
printf("Simple Interest = %f", si);
return 0;
}

Sample Run:

Enter the value of principle: 10000
Enter the time (in years): 3
Enter the interest rate: 12
Simple Interest = 3600.00

Program to read the length and bredth of a rectangle and find the perimeter

Source Code:

/*to find the perimeter of a rectangle*/
#include<stdio.h>
int main()
{
    float l, b, p;
    printf("Enter the value of length: ");
    scanf("%f", &l);
    printf("Enter the value of breadth: ");
    scanf("%f", &b);
    p = 2 * (l + b);
    printf("Perimeter of the rectangle is %f", p);
    return 0;
}

Sample Run:

Enter the value of length: 5
Enter the value of breadth: 6

Perimeter of the rectangle is 22