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1 // P120: 3.±à³ÌÌâ (3)
2
3 // The begining of C program: test04-03.c.
4
5 // Header files included.
6 #include <stdio.h>
7 #include <math.h>
8
9 // Main function's declaration.
10 int main ( void )
11 {
12 long int i_tag=0;
13 float f_num1, f_num2, f_num3;
14 double area=0.0, temp=0.0;
15 printf ( "Input the three side's length of triangle: " );
16 scanf ( "%f %f %f", &f_num1, &f_num2, &f_num3 );
17 if ( (f_num1<=0) || (f_num2<=0) || (f_num3<=0) )
18 {
19 printf ( "Input error, data is illegal!\n" );
20 return (1);
21 }
22 if ( ((fabs(f_num2-f_num3) < f_num1) && (f_num1 < (f_num2+f_num3))) ||
23 &nbs
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