int main(void)
{
printf("triangle validation.\n");
printf("first side: ");
float side_a = GetFloat();
printf("second side: ");
float side_b = GetFloat();
printf("third side: ");
float side_c = GetFloat();
bool validation = valid_triangle(side_a, side_b, side_c);
if(validation == true)
printf("valid triangle.\n");
else
printf("invalid triangle.\n");
return 0;
}
/* main function */
int main(void){
/* variable declaration */
double side1 = 0.0;
double side2 = 0.0;
double side3 = 0.0;
double area = 0.0;
/* accept sides from the user */
printf("Please enter the first side of the triangle: ");
scanf("%lf", &side1);
printf("Please enter the second side of the triangle: ");
scanf("%lf", &side2);
printf("Please enter the third side of the triangle: ");
scanf("%lf", &side3);
/* proceed with the main program objective */
/* use if and else to branch out first the validity of the triangle */
/* then the shape, and check if the triangle is also isoceles */
/* 0 is false, 1 is true */
/* calculate the area of the triangle */
area = area_of_triangle(side1, side2, side3);
/* this is valid */
if (valid_triangle(side1, side2, side3) == 1){
//equilateral triangles are never isoceles
if (equilateral_triangle(side1, side2, side3) == 1){
printf("\nEquilateral!\n");
}
//right triangle
else if (right_triangle(side1, side2, side3)== 1){
//check if triangle is isoceles also
if (isoceles_triangle(side1, side2, side3) == 1){
printf("\nIsoceles right triangle!\n");
}
else {
printf("\nRight triangle!\n");
}
}
//obtuse triangle
else if (obtuse_triangle(side1, side2, side3) == 1){
//check if triangle is isoceles also
if (isoceles_triangle(side1, side2, side3) == 1){
printf("\nIsoceles obtuse triangle!\n");
}
else {
printf("\nObtuse triangle!\n");
}
}
//acute triangle
else if (acute_triangle(side1, side2, side3) == 1){
//check if triangle is isoceles also
if (isoceles_triangle(side1, side2, side3) == 1){
printf("\nIsoceles acute triangle!\n");
}
else {
printf("\nAcute triangle!\n");
}
}
//print out the area of the triangle after determining the shape
printf("The area of the triangle is: %.2f\n", area);
}
//this is invalid
else {
printf("\nThe triangle is invalid because the length of one side is greater than or equal to the sum of the lengths of the other two sides\n");
}
return (0);
}