Semester Final Question Solve | EEE 2109 | SPRING 2017 | Programming Language

1a.cpp

/*
LINE 1: Wrong header. Correct Header <iostream>.
LINE 2: Missing namespace declearation.
LINE 3: Missing Main Function Scope.
LINE 5: Wrong operator for cout. Correct one "<<". 
        Missing cout operator before endl.
LINE 6: Wrong operator for cin. Correct One ">>". 
        Variable a,b not decleared.
LINE 8: Semicolon after if statement.
LINE 10: Condition on else statement.
LINE 11: Wrong function to output information. We should use "cout".
*/ 

1b.cpp

#include<iostream>
#include<cmath>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(pow(int(sqrt(n)),2)==n)
        cout<<n<<" is a square number"<<endl;
    else cout<<n<<" is not a square number"<<endl;
}

1c.cpp

#include<iostream>
using namespace std;
int main(){
    int n1,n2,n3;
    double w1,w2,w3;
    double avg;
    cout<<"Enter the three integers:"<<endl;
    cin>>n1>>n2>>n3;
    cout<<"Enter the weights of:"<<endl;
    cout<<"First no. ";
    cin>>w1;
    cout<<"Second no. ";
    cin>>w2;
    cout<<"Third no. ";
    cin>>w3;
    avg = (n1*w1+n2*w2+n3*w3)/(w1+w2+w3);
    cout<<"The weighted average of the numbers is: "<<avg<<endl;
}

1d.cpp

#include<iostream>
using namespace std;
bool check(int x,int y,int z){
    int min = x<y?(x<z?x:z):(y<z?y:z);
    if(x%min==0 && y%min==0 && z%min==0)
        return true;
    else return false;
}
int main(){
    int n1,n2,n3;
    cout<<"Enter three numbers: "<<endl;
    cin>>n1>>n2>>n3;
    if(check(n1,n2,n3))
        cout<<"The smallest number is a factor of other two."<<endl;
    else cout<<"The smallest number is not a factor of other two."<<endl;
}

2a.cpp

/* If we do not put break statement after the end of each 
clause in a switch statement then it will execute all the 
statements from the matching clause until the end of the 
swtich statement.
For Example: 
    switch(n){
        case 1: statement1;
        case 2: statement2;
        case 3: statement3;
        case 4: statement3;
    }
if n=2, then it will execute statement2, statement3 and statement 4.
*/

2b.cpp

#include<iostream>
#include<complex>
#define PI 3.1416
using namespace std;
int main(){
    double v, angle, c, r1, r2;
    cout<<"Enter Voltage,Voltage Angle, Capacitance, Resistane1, Resistance2: "<<endl;
    cin>>v>>angle>>c>>r1>>r2;
    complex <double> voltage(v,angle*PI/180);
    complex <double> xc(0,-1/(2*PI*50*c));
    complex <double> res1 (r1,0);
    complex <double> res2 (r2,0);
    complex <double> zth = r2*xc/(r2+xc);
    cout<<"Thevenin Resistance: "<<zth<<endl;
    cout<<"Thevenin Voltage: "<<voltage*r1/(r1+zth)<<endl;
}

2c.cpp

#include<iostream>
using namespace std;
void binary(int num){
    int rem;
    if (num <= 1){
      cout << num;
      return;
    }
    rem = num % 2;
    binary(num / 2);
    cout << rem;
}
int main(){
    int dec, bin;
    cout << "Enter the number : ";
    cin >> dec;
    cout << "The binary form of " << dec << " is ";
    binary(dec);
    cout << endl;
}

3a.cpp

#include<iostream>
using namespace std;
int large(int x){
    int max=0,n;
    for(int i=0;i<x;i++){
        cout<<"Enter Number "<<i+1<<": ";
        cin>>n;
        if(n>max) max = n;
    }
    return max;
}
int main(){
    int a;
    cout<<"How many numbers you want to check?"<<endl;
    cin>>a;
    cout<<"The largest number is "<<large(a)<<endl;
}

3b.cpp

#include<iostream>
using namespace std;
int main(){
    int n;
    cout<<"Enter a number: ";
    cin>>n;
    while(n>1){
        for(int i=2;i<=n;i++){
            if(n%i==0){
                cout<<i;
                n /= i;
                if(n>1)
                    cout<<"x";
                break;
            }
        }
    }
    cout<<endl;
}

3c.cpp

#include<iostream>
#include<complex>
using namespace std;
void quadratic(complex <double> &root1,complex <double> &root2){
    float a,b,c;
    cin>>a,b,c;
    double test = b*b - 4*a*c;
    if(test<0){
        root1 = (-b/(2*a),sqrt(abs(test)/(2*a)));
        root2 = (-b/(2*a),-sqrt(abs(test)/(2*a)));
    } else{
        root1 = ((-b+test)/(2*a),0);
        root2 = ((-b-test)/(2*a),0);
    }
}
int main(){
    complex <double> root1(0,0);
    complex <double> root2(0,0);
    quadratic(root1,root2);
    cout<<root1<<endl;
    cout<<root2<<endl;
}

//some errors in it

4a.cpp

#include<iostream>
#include<cmath>
using namespace std;
long long series(int n){
    if(n==0) return 1;
    return pow(7,n)*series(n-1);
} 
int main(){
    int a;
    cout<<"Input n: ";
    cin>>n;
    cout<<series(n)<<endl;
}

4b.cpp

#include<iostream>
using namespace std;
int main(){
    int a = 5, b=14;
    for(int i=0;i<5;i++){
        for(int j=0;j<i;j++)
            cout<<"  ";
        for(int k=i;k<5;k++)
            if(i==k){
                cout<<a--<<" ";
            } else {
                cout<<b--<<" ";
            }
        cout<<endl;
    }
}

4c.cpp

#include<iostream>
using namespace std;
int main(){
    int p = 3,m=2,sum,fifty,hundred,max=0;
    int a[p][m];
    for(int i=0;i<p;i++){
        cout<<"Batsman "<<i+1<<endl;
        for(int j=0;j<m;j++){
            cout<<"Match "<<j+1<<": ";
            cin>>a[i][j];
        }
    }
    for(int i=0;i<p;i++){
        sum = 0;
        fifty = 0;
        hundred = 0;
        for(int j=0;j<m;j++){
            sum+=a[i][j];
            if(a[i][j]>49 && a[i][j]<100)
                fifty++;
            if(a[i][j]>99)
                hundred++;
            if(a[i][j]>max) max = a[i][j];
        }
        cout<<"Avg of Batsman "<<i+1<<": "<<sum/double(m)<<endl;
        cout<<"Half-century of Batsman "<<i+1<<": "<<fifty<<endl;
        cout<<"Century of Batsman "<<i+1<<": "<<hundred<<endl;
    }
    for(int i=0;i<p;i++){
        for(int j=0;j<m;j++){
            if(a[i][j]==max){
                cout<<"Highest runs scored by Batsman "<<i+1<<endl;
                cout<<"Highest run was scored on Match "<<j+1<<endl;
                break;
            }
        }
    }
}

5a.cpp

#include<iostream>
using namespace std;
int frequency(float a[],int n,int x){
    int freq;
    for(int i=0;i<n;i++){
        if(a[i]==x){
            freq++;
        }
    }
    return freq;
}
int main(){
    int n,x;
    cout<<"How many numbers?"<<endl;
    cin>>n;
    float a[n];
    cout<<"Enter the numbers:"<<endl;
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    cout<<"Find frequency of which number?"<<endl;
    cin>>x;
    cout<<"Frequency: "<<frequency(a,n,x)<<endl;
}

5b.cpp

/*
x = 44
&x = 0x0028fefa
&rx = 0x0028fefa
rx = 43
px = 0x0028fefa
&px = 0x0028fef4
*px = 43
px = 0x0028fefe
*/

5c.cpp

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    char a[100];
    cin.getline(a,100);
    for(int i=strlen(a);i>=0;i--){
        cout<<a[i];
    }
    cout<<endl;
}

5d.cpp

/*
Object is born.
Object is born.
Object dies.
Object dies.
*/

6a.cpp

#include<iostream>
using namespace std;
int gcd(int m,int n){
    if(m<n)
        swap(m,n);
    while(m%n!=0){
        int a = n;
        n = m%n;
        m=a;
    }
    return n;
}
int main(){
	int m,n;
	cout<<"Enter Two Numbers: ";
	cin>>m>>n;
	cout<<"GCD of these two number is: "<<gcd(m,n)<<endl;
}

6b.cpp

#include<iostream>
using namespace std;
int main(){
    int size,x;
    int *ptr;
    cout<<"Enter size of the array: ";
    cin>>size;
    int a[size];
    cout<<"Enter Numbers: ";
    for(int i=0;i<size;i++){
        cin>>a[i];
    }
    ptr = a;
    cout<<"Enter Number to search for address: ";
    cin>>x;
    for(int i=0;i<size;i++,ptr++){
        if(*ptr == x ){
            cout<<x<<" is found at address: "<<&ptr<<endl;;
            return 0;
        }
    }
    cout<<"No such integer in this array."<<endl;
}

6c.cpp

#include<iostream>
#include<cstring>
using namespace std;
int main(){
    char s1[] = "Good";
    char s2[] = "bye";
    strcat(s1,s2);
    cout<<s1<<endl;
}

7a.cpp

#include<iostream>
using namespace std;
int main(){
    double speed[7];
    double max=0;
    cout<<"Enter speed of wind for 7 days: "<<endl;
    for(int i = 0; i < 7; i++){
        cin>>speed[i];
        if(speed[i]>max) max = speed[i];
    }
    cout<<"Max wind speed: "<<max<<endl;
    cout<<"Max speed were found on: ";
    for(int i=0;i<7;i++){
        if(speed[i]==max){
            switch(i){
                case 0: cout<<"Sunday ";break;
                case 1: cout<<"Monday ";break;
                case 2: cout<<"Tuesday ";break;
                case 3: cout<<"Wednesday ";break;
                case 4: cout<<"Thursday ";break;
                case 5: cout<<"Friday ";break;
                case 6: cout<<"Saturday ";break;
            }
        }
    }
    cout<<endl;

}

7b.cpp

#include<iostream>
using namespace std;
int main(){
    int size;
    cout<<"Size of array(must be odd number): ";
    cin>>size;
    int a[size];
    for(int i=0;i<size;i++){
        cin>>a[i];
    }
    for(int i = 0; i<size;i++){
        for(int j = 0;j<size-1;j++){
            if(a[j]>a[j+1]) 
                swap(a[j],a[j+1]);
        }
    }
    int mid = a[size/2];
    cout<<"Middle Number is "<<mid<<endl;
    if(mid%2==0) cout<<mid<<" is a even number."<<endl;
    else cout<<mid<<" is a odd number"<<endl;
}

8a.cpp

#include<iostream>
using namespace std;
class Minimum{
    public:
        void assign(int a,int b,int c){
            n1 = a;
            n2 = b;
            n3 = c;
        }
        int findMinimum(){
            return n1<n2?(n1<n3?n1:n3):(n2<n3?n2:n3);
        }
    private:
        int n1,n2,n3;
};

int main(){
    Minimum m;
    int x,y,z;
    cout<<"Enter Three Numbers: ";
    cin>>x>>y>>z;
    m.assign(x,y,z);
    cout<<"Minimum number is "<<m.findMinimum()<<endl;
}

8b.cpp

#include<iostream>
#define PI 3.1416
using namespace std;
class Rectangle{
public:
    double height,width;
    void getdata_Rect(){
        cout<<"Enter Height of Rectangle: ";
        cin>>height;
        cout<<"Enter Width of Rectangle: ";
        cin>>width;
    }
    void displayarea_Rect(){
        cout<<"Area of Rectangle is "<<height*width<<endl;
    }
};
class Circle{
public:
    double radius;
    void getdata_Circle(){
        cout<<"Enter Radius of Circle: ";
        cin>>radius;
    }
    void displayarea_Circle(){
        cout<<"Area of Circle is "<<PI*radius*radius<<endl;
    }
};
class Result:public Rectangle,public Circle{
public:
    void getData(){
        getdata_Rect();
        getdata_Circle();
    }
    void display(){
        displayarea_Rect();
        displayarea_Circle();
    }
};

int main(){
    Result r;
    r.getData();
    r.display();
}