The document provides examples of 10 different C programs including: 1) Finding the average of two numbers 2) Calculating the distance between two points 3) Computing the area and circumference of a circle 4) Displaying the area and perimeter of a rectangle 5) Printing the ASCII value of a character 6) Converting between Fahrenheit and Celsius temperatures 7) Swapping two variables with and without a temporary variable 8) Calculating the area of a triangle 9) Converting between uppercase and lowercase letters 10) Converting Celsius to Fahrenheit

1. C programs
1. C program to find average of two numbers
2. C program to find distance between two ponts
Sqrt( (x2-x1)2 + (y2-y2)2)
3. C program to find area and circumference of circle .
area =∏r2 circumference =2 ∏r
4. C program to find area and perimeter of rectange
area = length * width
Perimeter = 2(length + width)
5. C program to print ACII value of character
6. C program to convert Fahrenheit to degree Celsius
C = (0.56) *(F-32)

2. 7. C program to swap two variables with temporary
variable
8. C program to swap two variables without temporary
variable
9. C program to print area of triangle
S=(a+b+c)/2
area = sqrt(s (s-a)(s-b) (s-c) )
10.C program to convert uppercase to lowercase and
lowercase to uppercase letter

3. Program2:
#include<stdio.h>
#include<math.h>
int main()
{
float x1,x2,y1,y2,dist;
printf("Enter x1 and x2n");
scanf("%f%f",&x1,&x2);
printf("Enter y1 and y2 n ");
scanf("%f%f",&y1,&y2);
dist = sqrt(pow((x2-x1),2)+pow((y2-y1),2));
printf("Distance between two points : %fn",dist);
return 0;
}

4. Program 3:
#include<stdio.h>
#define PI 3.1416
int main()
{
float area, radius , cir;
printf("Enter the radius of the circlen");
scanf("%f", &radius);
area = PI * radius * radius;
cir = 2* PI * r ;
printf("The area of the circle is: %fn", area);
printf("The circumference of the circle is: %fn",cir);
}

5. Program 5:
#include<stdio.h>
int main()
{
char ch ;
printf(“enter a character n”);
scanf(“%c”,&ch);
printf(“the Ascii value of character is %d”,ch);
return 0;
}

6. #include<stdio.h>
int main()
{
char ch, upper,lower;
printf(“enter a character n”);
scanf(“%c”,&ch);
lower = ch + 32;
upper = ch - 32;
printf(“the lower case of character is %c”,lower);
printf(“the upper case of character is %c”,upper);
return 0;
}

7. #include<stdio.h>
int main()
{
int a, b, temp;
printf(“enter a and b valuesn”);
scanf(“%d%d”,&a,&b);
temp = a;
a = b ;
b = temp;
printf(“after swapping a value is %dn”,a);
printf(“after swapping b value is %dn”,b);
return 0;
}

8. #include<stdio.h>
int main()
{
int a, b;
printf(“enter a and b valuesn”);
scanf(“%d%d”,&a,&b);
a = a + b ;
b = a – b ;
a = a – b ;
printf(“after swapping a value is %dn”,a);
printf(“after swapping b value is %dn”,b);
return 0;
}

9. #include<stdio.h>
int main()
{
float C, F;
printf("Enter the Fahrenheit n");
scanf("%f", &F);
C = 0.56 *(F-32);
printf(" Fahrenheit to degree Celsius %fn", C );
return 0;
}

10. #include<stdio.h>
int main()
{
float C, F;
printf("Enter the Celsius n");
scanf("%f", &C);
F = (1.8 * C) + 32;
printf(" Fahrenheit to degree Celsius %fn", C );
return 0;
}