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# Reading points from user and calculating the distance between them in the Euclidean space in C ## Algorithm

Input: Input 4 points from user
output: Displays the distance between point 1&2 and between point 3&4 and the sum of the distances.

1. Start
2. Read x1,x2,x3,x4,y1,y2,y3,y4 from user, which are the co-ordinate of points 1,2,3 and 4
3. d1 = pow(pow((d.x2-d.x1),2) + pow((d.y2-d.y1),2),0.5)
4. d2 = pow(pow((d.x3-d.x4),2) + pow((d.y3-d.y4),2),0.5)
5. d.s = d1 + d2 (d is a variable for a structure)
6. Print "The distance between 1st and 2nd is ", d1
7. Print "The distance between 3rd and 4th is", d2
8. Print "The sum of distance between 1st,2nd,3rd and 4th point is ", d.s
9. Stop

## C Program #include <stdio.h>
#include <math.h>

struct distance{
float x1,x2,y1,y2,x3,x4,y3,y4,s;
}d;

int main()
{
float d1,d2;
//Inputing data for first distance
printf("Enter the x-coordinate of 1st point: ");
scanf("%f", &d.x1);
printf("Enter the y-coordinate of 1st point: ");
scanf("%f", &d.y1);
printf("Enter the x-coordinate of 2nd point: ");
scanf("%f", &d.x2);
printf("Enter the y-coordinate of 2nd point: ");
scanf("%f", &d.y2);

//Inputing data for second distance
printf("Enter the x-coordinate of 3rd point: ");
scanf("%f", &d.x3);
printf("Enter the y-coordinate of 3rd point: ");
scanf("%f", &d.y3);
printf("Enter the x-coordinate of 4th point: ");
scanf("%f", &d.x4);
printf("Enter the y-coordinate of 4th point: ");
scanf("%f", &d.y4);

//Calculating the distances
d1 = pow(pow((d.x2-d.x1),2)+pow((d.y2-d.y1),2),0.5);
d2 = pow(pow((d.x3-d.x4),2)+pow((d.y3-d.y4),2),0.5);
d.s= d1+d2;

//Displaying values to user
printf("The distance between 1st and 2nd is %f\n", d1);
printf("The distance between 3rd and 4th is %f\n", d2);
printf("The sum of distance between 1st,2nd,3rd and 4th point is %f",d.s);

return 0;
}

## Output

Enter the x-coordinate of 1st point: 2
Enter the y-coordinate of 1st point: 3
Enter the x-coordinate of 2nd point: 3
Enter the y-coordinate of 2nd point: 4
Enter the x-coordinate of 3rd point: 4
Enter the y-coordinate of 3rd point: 5
Enter the x-coordinate of 4th point: 5
Enter the y-coordinate of 4th point: 6

The distance between 1st and 2nd is 1.414214
The distance between 3rd and 4th is 1.414214
The sum of distance between 1st,2nd,3rd and 4th point is 2.828427