#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,c;
clrscr();
printf("enter value of a:");
scanf("%d",&a);
printf("enter value of b:");
scanf("%d",&b);
printf("enter value of c:");
scanf("%d",&c);
if((a+b)>c&&(b+c)>a&&(a+c)>b)
{
printf("triangle is valid");
if(a==b&&b==c&&c==a)
{
printf("triangle is equilateral");
}
else if(a!=b&&b!=c&&c!=a)
{
printf("triangle is scalene");
}
else
{
printf("triangle is isoceles.");
}
}
else
{
printf("triangle is invalid");
}
getch();
}
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