The document contains a series of simple C programming exercises designed for beginners to practice problem-solving skills. These exercises include swapping numbers, calculating simple and compound interest, finding the sum of digits in a three-digit number, converting Fahrenheit to Celsius, and others. Each exercise includes sample input and output to demonstrate the expected results.

1. Programming for problem solving using C language
Simple programs for practice-1
By
Smt. Venkata Sushma chinta

2. 1.WAP to swap two numbers
Sample Input :
Enter two numbers
3
48
Sample Output:
Before swapping a=3 and b=48
After swapping a=48 and b=3

3. 2.WAP to find simple interest and compound
interest.
Sample Input :
Enter the principle amount
200000
Enter time period in years
2
Enter rate of interest
12
Enter frequency of compounding
2
Sample output:
The simple interest= 48000.00
The compound interest= 52495.34

4. 3.WAP to find the sum of digits of a three digit
number.
Sample Input :
Enter a three digit number
123
Sample Output :
The sum of the digits of 123 is 6

5. 4.WAP to convert the temperature in Fahrenheit to degrees
Celsius
Sample Input :
Enter a temperature in Fahrenheit
212
Sample Output :
Celsius temperature= 100.00

6. 5. Write a C program to convert a given integer (in days) to years, months and days,
assumes that all months have 30 days and all years have 365 days.
Sample Input :
Enter no.of days
2536
Sample Output :
6 year(s)
11 months(s)
16 day(s)

7. 6. Income Calculation:
In a company named Micky software solution, many part-time employees are working for a pay of
Rs. 100 per hour. Write a program to calculate the total amount an employee earns in a year by
working part time. Consider employees should work all day in the year and year has 365 days.
Sample Input :
Enter no of hours worked in a day
3
Sample Output :
Total income in a year is 109500

8. 7. Compute Gain Percentage
Vikram buys an old scooter for Rs. A and spends Rs. B on its repairs. If he sells the scooter for Rs. C ,
What is the gain %?
Sample Input :
Price of old scooter:
4700
The amount spent for repair:
800
Sold Price:
5800
Sample Output :
Gain percentage is 5.45

9. 8. Display Characters
Rohan wants a magic board, which displays a character for a corresponding number for his science exhibition. Help him
to develop such application.
For example when the digits 65,66,67,68 are entered, the alphabet ABCD are to be displayed.
• Sample Input :
Enter the digits:
65
66
67
68
• Sample Output :
65-A
66-B
67-C
68-D

10. 1.WAP to swap two numbers
#include<stdio.h>
int main()
{
int a,b,temp;
printf("enter two numbersn");
scanf("%d%d",&a,&b);
printf("Before swapping a=%d and b=%dn",a,b);
temp=a;
a=b;
b=temp;
printf("After swapping a=%d and b=%dn",a,b);
return 0;
}

11. 2.WAP to find simple interest and compound interest.
/*program to find simple interest and compound interest*/
#include<stdio.h>
#include<math.h>
int main()
{
float p,t,r,n,si,ci;
printf("Enter principle amountn");
scanf("%f",&p);
printf("Enter time period in yearsn");
scanf("%f",&t);
printf("Enter rate of interestn");
scanf("%f",&r);
printf("Enter compounding frequencyn");
scanf("%f",&n);
si=(p*t*r)/100.0;
ci=p*(pow(1+r/(100*n),n*t)-1);
printf("The simle interest = %.2f nThe compound interest=
%.2fn",si,ci);
}

12. 3.WAP to find the sum of digits of a three digit number.
/*program to find the sum of the digits of a 3 digit number*/
#include<stdio.h>
int main()
{
int n,ld,sd,fd,sum,t;
printf("enter a three digit numbern");
scanf("%d",&n);
t=n;
ld=n%10;
n=n/10;
sd=n%10;
fd=n/10;
sum=fd+sd+ld;
printf("the sum of the digits of %d is %dn",t,sum);
return 0;
}

13. 4.WAP to convert the temperature in Fahrenheit to degrees
Celsius
/* to convert the temperature in Fahrenheit to degrees Celsius*/
#include<stdio.h>
int main()
{
float fah, cel;
printf("Enter a temperature in Fahrenheitn");
scanf("%f", &fah);
cel = (5.0/9) * (fah - 32);
printf("Celsius temperature= %.2f n", cel);
return 0;
}

14. 5. Write a C program to convert a given integer (in days) to years,
months and days, assumes that all months have 30 days and all years
have 365 days.
#include <stdio.h>
int main()
{
int n,y,m,d,x;
printf("Enter no. of days: ");
scanf("%d", &n);
y =n/365;
x=n%365;
m=x/30;
d=x%30;
printf(" %d Year(s) n %d Month(s) n %d Day(s)",y,m,d);
return 0;
}

15. 6. Income Calculation:
In a company named Micky software solution, many part-time employees are working for a pay of
Rs. 100 per hour. Write a program to calculate the total amount an employee earns in a year by
working part time. Consider employees should work all day in the year and year has 365 days.
/*Income calculation*/
#include <stdio.h>
int main()
{
int h,ai;
printf("Enter no of hours worked in a dayn");
scanf("%d",&h);
ai=100*h*365;
printf("Total income in a year is %dn",ai);
return 0;
}

16. 7. Vikram buys an old scooter for Rs. A and spends Rs. B on its
repairs. If he sells the scooter for Rs. C , What is the gain %?
/*Gain percentage*/
#include <stdio.h>
int main()
{
float p,r,s,tc,g;
printf("Price of the old scooter:n");
scanf("%f",&p);
printf("The amount spent for repair:n");
scanf("%f",&r);
printf("Sold price:n");
scanf("%f",&s);
tc=p+r;
g=(s-tc)/tc*100;
printf("Gain percentage is: %.2fn",g);
return 0;
}

17. 8. Display Characters
Rohan wants a magic board, which displays a character for a corresponding number for his science exhibition.
Help him to develop such application.
For example when the digits 65,66,67,68 are entered, the alphabet ABCD are to be displayed.
/*Display Characters for numbers*/
#include <stdio.h>
int main()
{
int n1,n2,n3,n4;
printf("Enter digits n");
scanf("%d%d%d%d",&n1,&n2,&n3,&n4);
printf("%d-%cn",n1,n1);
printf("%d-%cn",n2,n2);
printf("%d-%cn",n3,n3);
printf("%d-%cn",n4,n4);
return 0;
}