Programming in C

Question

Write a program to allow the user to enter the lengths of each side of a polygon. It is upto the user to decide the number of sides in their polygon. When the user is done, you have to output the name of the shape, and the perimeter of the polygon. 

Answer 1

#include <stdio.h>

// Function to get name of polygon based on the number of sides

const char* getPolygonName(int sides) {

switch (sides) {

case 3: return "Triangle";

case 4: return "Quadrilateral";

case 5: return "Pentagon";

case 6: return "Hexagon";

case 7: return "Heptagon";

case 8: return "Octagon";

case 9: return "Nonagon";

case 10: return "Decagon";

default: return "Polygon";

}

}

int main() {

int n;

double sideLength, perimeter = 0;

// Ask user for the number of sides

printf("Enter the number of sides of your polygon (>= 3): ");

scanf("%d", &n);

if (n < 3) {

printf("A polygon should have at least 3 sides.\n");

return 1; // exit with an error code

}

// Ask user for the length of each side

for (int i = 0; i < n; i++) {

printf("Enter length of side %d: ", i + 1);

scanf("%lf", &sideLength);

perimeter += sideLength;

}

// Display the name of the polygon and its perimeter

printf("\nYour shape is a %s.\n", getPolygonName(n));

printf("The perimeter of the polygon is: %.2lf\n", perimeter);

return 0;

}