C. Triangle Area

Enter three numbers on the keyboard, set them to the three sides of the triangle, and then calculate the area.

# Include "stdio. H"
# Include "conio. H"
# Include <math. h>

Main (){
Float a, B, c;
Float area;
Float S;
Scanf ("% F, % F, % F", & A, & B, & C );
If (a + B) <c ){
Printf ("erro ");
} Else if (a-B)> C ){
Printf ("erro ");
} Else {
S = 1.0/2 * (A + B + C );
Area = SQRT (S * (S-A) * (S-B) * (s-c ));
Printf ("% F", area );
}
Getch ();
}

ThisProgramIt took me a long time.

Knowing that SQRT is an open request

However, there are many details to be aware.

First, when the scanf function is called, the input format must be consistent with the defined type. Otherwise, there will be deviations.

In addition, you must import the package math because the SQRT function is called,

Otherwise, what will happen?