q4

q4.c

/***************************************************
    Exercise 1.4
    Rewrite the following program using optimal C coding style.
    Pay attention to:
    - white spaces and indentation
    - short-cut boolean expressions in if or loop statements
    - use the conditional operator
    - code redundancy
    - proper use of the relational expression in a return statement
    - use of the comma operator in a loop
    - use of && and || to prevent if nesting


    Name: Sunho Kim
***************************************************/
#include <stdio.h>

int checkTriangle(double a, double b, double c);

int main (void)
{
    double a = 10, b = 2, c = 3;

    printf("%.1f %.1f %.1f are ",a,b,c);
    if (checkTriangle(a,b,c)==0)
        printf("not ");
    printf("the sides of a triangle!\n");

    return 0;
}
/***************************************************
    Checks if a, b, and c are the sides of
    a triangle
        PRE a, b, c are sides of triangle
        POST return 0 if not triangle, 1 if triangle
*/
int checkTriangle(double a, double b, double c)
{
    if (a <= 0)
        return 0;
    
    if (b <= 0)
        return 0;
    
    if (c <= 0)
        return 0;
    
    if (a >= b + c) 
        return 0;
    
    if (b >= a + c)
        return 0;
    
    if (c >= a + b) 
        return 0;
    
    return 1;
}
/** SAVE THE OUTPUT BELOW
10.0 2.0 3.0 are not the sides of a triangle!
*/