Question 34: Any input of three sides (a, B, c real-type), if a Triangle can be formed, the area is calculated and output; otherwise, the output mark is "No Triangle ".

[Plain]
/* Start the comments in the program header (to avoid any problems encountered during the submission of blog posts, the slash used to indicate that the comments have been deleted)
* Copyright and version Declaration of the program
* All rights reserved.
* File name: txt. c
* Author: liuyongshui
* Question: Any input of three sides (a, B, and c). If a triangle can be formed, the area is calculated and output,
* Otherwise, the output flag is "No Triangle !".
* Question:

* Completion date: January 1, April 10, 2013
* Version No.: V1.0
*/
 
# Include <stdio. h>
# Include <math. h>
 
Int main ()
{
Float;
Float B;
Float c;
Float t;
Float sum = 0;
 
Printf ("three sides of the input triangle (real number) a, B, c: \ n ");
Scanf ("% f", & a, & B, & c );
 
If (a + B> c) | (a + c> B) | (B + c> ))
{
T = (a + B + c)/2;
Sum = sqrt (t * (t-a) * (t-B) * (t-c ));
 
Printf ("Area of the triangle: % f \ n", sum );
}
Else
{
Printf ("N0 Trigale! \ N ");
}
 
Return 0;
}

/* Start the comments in the program header (to avoid any problems encountered during the submission of blog posts, the slash used to indicate that the comments have been deleted)
* Copyright and version Declaration of the program
* All rights reserved.
* File name: txt. c
* Author: liuyongshui
* Question: Any input of three sides (a, B, and c). If a triangle can be formed, the area is calculated and output,
* Otherwise, the output flag is "No Triangle !".
* Question: (http://blog.csdn.net/sxhelijian/article/details/7936569 ).
* Completion date: January 1, April 10, 2013
* Version No.: V1.0
*/

# Include <stdio. h>
# Include <math. h>

Int main ()
{
Float;
Float B;
Float c;
Float t;
Float sum = 0;

Printf ("three sides of the input triangle (real number) a, B, c: \ n ");
Scanf ("% f", & a, & B, & c );

If (a + B> c) | (a + c> B) | (B + c> ))
{
T = (a + B + c)/2;
Sum = sqrt (t * (t-a) * (t-B) * (t-c ));

Printf ("Area of the triangle: % f \ n", sum );
}
Else
{
Printf ("N0 Trigale! \ N ");
}

Return 0;
}