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Program Based on If & Else

Program to input length of all sides of the triangle and check whether triangle is valid or not

Input - Output

Input
Enter sides of the triangle: 5 7 3

Output
Triangle is valid

Input
Enter sides of the triangle: 6 3 2

Output
Triangle is invalid

Algorithm

Step 1: START

Step 2: Enter the sides of the triangle.

Step 3: Check the condition:

    if (some of any two sides is greater than 3rd sides)

      print triangle is valid

   else

      print triangle is invalid

Step 4: END

CODE


/* Check triangle is valid or not */
#include  <stdio.h>
int main()
{
      int a,b,c;
      printf(" Enter three sides of a triangle : ");
      scanf("%d%d%d",&a,&b,&c);
      if(a+b>c)
          if(b+c>a)
              if(a+c>b)
                  printf("Triangle is valid ");
              else
                  printf("Triangle is not valid ");
          else
            printf("Triangle is not valid ");
      else
         printf("Triangle is not valid ");
    return 0;
}


/* Check Triangle is valid or not */
#include <iostream>
using namespace std;
int main()
{
      int a,b,c;
      cout<<" Enter three sides of a triangle : ";
      cin>>a>>b>>c;
      if(a+b>c)
          if(b+c>a)
              if(a+c>b)
                  cout<<"Triangle is valid ";
              else
                  cout<<"Triangle is not valid ";
          else
            cout<<"Triangle is not valid ";
      else
         cout<<"Triangle is not valid ";
    return 0;
}

OutPut

Enter sides of the triangle: 6 3 2

Triangle is invalid

Recommendation

1. Basic C program.
2. Program based on If - Else
3. Program based on Loops
4. Program based on Conversion
5. Program based on Pattern