if else statements in C++ | Part 2

In this Post we will do some more if else Practice Programs in C++. To Check Part 1 of if else statements practice in C++ Visit Part 1

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Task 3

Write a program that takes 3 numbers a,b,c as input from the user and if a is not equal to zero then check if a is the common divisor of b and c or not.
Common Divisor: means b and c both are divisible by a

Code

#include<iostream>
using namespace std;
int main()
{
	//input three variables a,b,c;
	int a,b,c;
	cout<<"Enter Three Numbers : \n";
	cin>>a>>b>>c;
	//conditions to check if a is zero or not
	if(a==0)
	{
		cout<<"a is zero ";
	}
	else
	{
		//if a is not zero we have to check if b and c are divisibe by a or not
		//for that purpose once again conditions
		if(b%a==0 && c%a==0)
		//if a number is divisible by other then it means it's
		//remainder is zero % operator returns the remainder
			cout<<"\na is common divisor of b and c";
		else
			cout<<"\na is not common divisor of b and c";
	}
}

Output

Enter Three Numbers :
4
16
56

a is common divisor of b and c

Task 4

Write a program that ask the user total marks and obtained marks.calculate the percentage and then display the grade according to this.
if obt_m greater then ttl_m invalid
else if p greater then 80 A
else if p greater then 70 B
else if greater then 60 C
else if greater then 55 D
else if greater then 50 E
else if greater then 50 F

Code

#include<iostream>
using namespace std;
int main()
{
	//variables required
	float obt_m , ttl_m,perc;
	char grade;
	//input total marks and obtained marks
	cout<<"Enter Total Marks : ";
	cin>>ttl_m;
	cout<<"\nEnter Obtained Marks : ";
	cin>>obt_m;
	//calculating percentage
	perc=(obt_m/ttl_m)*100;
	//checking conditions..
	if(obt_m>ttl_m)
		{ cout<<"\nInvalid Input "; return 0;}
	else if(perc>=80)
		grade='A';
	else if(perc>=70)
		grade = 'B';
	else if(perc>=60)
		grade='C';
	else if(perc>=55)
		grade = 'D';
	else if(perc>=50)
		grade='E';
	else if(perc<50)
		grade = 'F';
	//printing grade
	cout<<"\nYour Grade is : "<<grade;
	cout<<"\nYour Percentage is : "<<perc;

}

Output

Enter Total Marks : 1100

Enter Obtained Marks : 904

Your Grade is : A
Your Percentage is : 82.1818