e6390af40fd246928c9f6b67562cf0fa37712fa8

10/13/2017

Basic structure of if else if in c++ programming Language

In this post we will discus basic structure of if else if in c++ programming. first we discus basic real life example of if else if  in our life..if else if is like a road having many ways to move forward but you can move only on one road at that time.Then we we else at the end of the if else if because if your  condition will be wrong then the else is selected.The syntax of if else if is given bellow.

Syntax:
#include<iostream>
using namespace std;   //header files
void main() 
{
   if(conditon 1)
   {
         // body of if    
   }
   else if(condition 2)
   {
        // body of else if    
   }
   else if(condtion 3)
   {
    // body of else if     
   }
   else
   {
        // body of else  
   }
       system("pause");

}//body of main.

Example of If else If
Write a c++ program in which user give the marks of a student and the program assign him the grades.
The criteria is given bellow.

if marks >=90 then Grade A+
if marks >=80 then Grade A
if marks >=70 then Grade B+
if marks >=60 then Grade B
if marks >=50 then Grade c
if marks <=40 then Grade F


Solution:
#include<iostream>
using namespace std;   //header files
void main() 
{
     int a;  //declare a variable a. cosider it veriable for taking marks.
     cout<<"Enter your marks :"<<endl;   //message
     cin>>a; //taking input from the user.

   if(a>=90)// this condition will compare a with the 90 or greater values.
   {
        cout<<" Your grade is A+"<<endl;
   }
   else if(a>=80)//  this condition will compare a with the 80 or greater values but less then 90.
   {
        cout<<" Your grade is A "<<endl;
   }
   else if(a>=70)// this condition will compare a with the 70 or greater values but less then 80.
   {
        cout<<" Your grade is B+ "<<endl;
   }
   else if(a>=60)// this condition will compare a with the 60 or greater values but less then 70.
   {
        cout<<" Your grade is B "<<endl;
   }
   else if(a>=50)// this condition will compare a with the 50 or greater values but less then 60.
   {
        cout<<" Your grade is C "<<endl;
   }
   else if(a>=30)// this condition will compare a with the values less then 40.
   {
        cout<<" Your grade is F "<<endl;
   }
   else
   {
        cout<<" Invalid input.."<<endl; //when user enter any character or invalid value...
   }
   cout<<"\n\n\n"<<endl;  //used for next line.
     system("pause");

}//body of main.






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