Class 11 , Computer science all c++ programs, Maharashtra board
personAYUSH KUSHWAHA
August 08, 2025
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Class 11 Computer Science - C++ Programs Maharashtra board
Q1 -> Write a c++ program to calculate sum and average of 3 numbers.
// Write a c++ program to calculate sum and average of 3 numbers.
#include <iostream>
using namespace std;
int main(){
float a,b,c,sum,avg;
cout << "enter three numbers " << endl;
cin >> a >> b >> c;
sum = a + b + c;
avg = sum / 3;
cout << "The sum of three numbers is " << sum << endl;
cout << "Average of three numbers is " << avg;
}
Q -> Write a c++ program to check weather the number is divisible by 5 or not.
// Write a c++ program to check weather the number is divisible by 5 or not.
#include<iostream>
using namespace std;
int main(){
cout<<"enter a number ";
int n;
cin>>n;
if(n%5 == 0){
cout<<"the number is divisible by 5";
}
else{
cout<<"the number is not divisible by 5";
}
}
Q -> Write a program in c++ to find the greater number among 3 numbers .
//Write a program in c++ to find the greater number among 3 numbers .
#include<iostream>
using namespace std;
int main(){
int a,b,c,max;
cout<<"enter 3 numbers ";
cin>>a>>b>>c;
if(a>b){
max = a;
}
else{
max = b;
}
if(c>max){
max = c;
}
cout<<"the greater num among the three numbers is "<<max;
}
Q-> Write a c++ program to accept number and check it is prime or not .
// Write a c++ program to accept number and check it is prime or not .
#include<iostream>
using namespace std;
int main(){
int n,c = 0;
cout<<"enter a number ";
cin>>n;
for(int i = 2;i<n;i++){
if(n%i == 0){
c = 1;
}
}
if(c == 0){
cout<<n<<" is a prime number ";
}
else{
cout<<n<<" is not a prime number ";
}
}
Q-> write a program in c++ to find the greatest common divisor(GCD) of two numbers .
// write a program in c++ to find the greatest common divisor(GCD) of two numbers .
#include<iostream>
using namespace std;
int main(){
int n1,n2;
cout<<"enter two numbers "<<endl;
cin>>n1>>n2;
while(n1 != n2){
if(n1>n2){
n1 = n1-n2;
}
if(n2 > n1){
n2 = n2-n1;
}
}
cout<<" the gcd is "<<n1;
}
Q-> Write a c++ program to find the sum of first 100 numbers using while loop.
// Write a c++ program to find the sum of first 100 numbers using while loop.
#include<iostream>
using namespace std;
int main(){
int d = 1,sum = 0;
while(d<=100){
sum = sum+d;
d = d+1;
}
cout<<"sum of 100 no. is "<<sum;
}
Q-> Write a c++ program to calculate and print factorial of a given number.
// Write a c++ program to calculate and print factorial of a given number.
#include<iostream>
using namespace std;
main(){
int a,b =1;
cout<<"enter a number ";
cin>>a;
for(int i =1;i<=a;i++){
b = b*i;
}
cout<<"factorial of "<<a<<" is "<<b;
}
Q-> Write a c++ program to display fibonnocci series of a 15 terms.
// Write a c++ program to display fibonnocci series of a 15 terms.
#include<iostream>
using namespace std;
int main(){
int f0=0,f1=1,f;
cout<<"fibonnacci series is "<<endl;
cout<<f0<<endl<<f1<<endl;
for(int i = 2;i<=15;i++){
f = f0+f1;
cout<<f<<endl;
f0=f1;
f1 = f;
}
}
Q-> Write a program in c++ to describe the use of scope resolution operator.
// Write a program in c++ to describe the use of scope resolution operator.
#include<iostream>
using namespace std;
int a = 50;
int main(){
int a = 20;
cout<<"local variable value "<<a<<endl;
cout<<"global variable value "<<::a<<endl;
}
Q-> Write a program in c++ to display the number which are divisile by 5 and 7.
// Write a program in c++ to display the number which are divisile by 5 and 7.
#include<iostream>
using namespace std;
int main(){
int i;
cout<<"The numbers between 1 to 50 which are divisible by 5 & 7 "<<endl;
for(i = 1;i<=50;i++){
if(i%5 == 0 && i%7 == 0){
cout<<i;
}
}
}
Q-> Write a c++ program to find area of a circle using funtion.
// Write a c++ program to find area of a circle using funtion.
#include<iostream>
using namespace std;
int main(){
float area(float);
float r;
cout<<"enter radius"<<endl;
cin>>r;
area(r);
}
float area(float r){
float a;
a = 3.14*r*r;
cout<<"area is = "<<a;
}
Q-> Write a c++ program to find area of rectangle using function.
// Write a c++ program to find area of rectangle using function.
#include<iostream>
using namespace std;
int main(){
int area(int l,int b);
int l,b;
cout<<"enter length and breadth";
cin>>l>>b;
area(l,b);
}
int area(int x,int y){
int a;
a=x*y;
cout<<"area of rectangle is "<<a;
}
Q-> Write a c++ program to calculate and print factorial of a given number by using function.
// Write a c++ program to calculate and print factorial of a given number by using function.
#include<iostream>
using namespace std;
main(){
int fact(int);
int n;
cout<<"enter a number ";
cin>>n;
fact(n);
}
int fact(int n){
int f = 1;
for(int i =1;i<=n;i++){
f = f*i;
}
cout<<"factorial of is "<<f;
}
Q->write c++ program to swap two numbers using call by reference in function
// write c++ program to swap two numbers using call by reference in function.
#include<iostream>
using namespace std;
int main(){
int x,y;
void swap(int *x , int *y);
x = 100;
y = 50;
cout<<"values before swap "<<endl;
cout<<"x = "<<x<<endl<<"y = "<<y<<endl;
swap(&x,&y);
cout<<"values after swap "<<endl;
cout<<"x = "<<x<<endl<<"y = "<<y<<endl;
}
void swap(int *x,int *y){
int temp;
temp = *y;
*x = *y;
*y = temp;
}
Q-> check weather the given year is leap year or not by using function.
// check weather the given year is leap year or not by using function.
#include<iostream>
using namespace std;
int main(){
int leap(int);
int n;
cout<<"enter a year "<<endl;
cin>>n;
leap(n);
}
int leap(int n){
if (n%4 ==0){
cout<<"year "<<n<<" is leap year "<<endl;
}
else{
cout<<"year "<<n<<" is not a leap year "<<endl;
}
}
Q-> Write a c++ program with function min() to returns the smallest number among the four given integers.
// Write a c++ program with function min() to returns the smallest number among the four given integers.
#include<iostream>
using namespace std;
int main(){
int min(int,int,int,int);
int a,b,c,d;
cout<<"enter 4 integer numbers "<<endl;
cin>>a>>b>>c>>d;
cout<<"the smallest number is = "<<min(a,b,c,d);
}
int min(int n1,int n2,int n3,int n4){
int small;
small = n1;
if(n2<small){
small = n2;
}
if(n3<small){
small = n3;
}
if(n4<small){
small = n4;
}
return small;
}
Q-> Write c++ program to find the area of circle and area of rectangle by concept of function overloding.
// Write c++ program to find the area of circle and area of rectangle by concept of function overloding.
#include<iostream>
using namespace std;
int main(){
float area(float);
float area(float , float);
float r;
float l,b;
cout<<"enter radius"<<endl;
cin>>r;
cout<<"enter length and breadth"<<endl;
cin>>l>>b;
area(r);
area(l,b);
}
float area(float r){
float c = 3.14*r*r;
cout<<"area of circle is "<<c<<endl;
}
float area(float l,float b){
float x = l*b;
cout<<"area of retangle is "<<x<<endl;
}
Q-> Write a c++ program to perform arthematic calculation such as addition subtraction etc. depending on user choice using switch statement.
// Write a c++ program to perform arthematic calculation such as addition subtraction etc. depending on user choice using switch statement.
#include<iostream>
using namespace std;
int main(){
float a,b,result;
cout<<"enter 2 numbers "<<endl;
cin>>a>>b;
cout<<"1 Addition \n 2 subtraction \n 3 multipliction \n 4 division"<<endl;
int ch;
cin>>ch;
switch(ch){
case 1:
result = a+b;
cout<<"sum is "<<result;
break;
case 2:
result = a-b;
cout<<"difference is "<<result;
break;
case 3:
result = a*b;
cout<<"product is "<<result;
break;
case 4:
result = a/b;
cout<<"division is "<<result;
break;
default:
cout<<"invalid choice";
}
}
