The C statement with the 'extern' keyword is a:

#include using namespace std; int main() { int a = 45; int c = a++; cout << c; return 0; }

What is the output of the following C code?

int main()

{

       int a=0;

       a=4+4/2*5+20;

       printf("%d",a);

       return 0;

}

What will be the output of the following C code?

void main()

{

 char a[] = "12345\0";

 int i = strlen(a);

 printf("here in 3 %d\n",++i);

}

What is a compiler-compiler?

What will be the output of the following C++ code?

#include <iostream>

using namespace std;

void mani()

void mani()

{

cout<<"hai";

}

int main()

{

       mani();

return 0;

}

What happens if the following program is executed in C and C++?

#include <stdio.h>
void main()
{
printf("Hello World");
}

In the program below, if the first string is entered as 'GOOD' and the second as 'MORNING', what will be the expected output?

int main()

{

  char str1[25], str2[50];

  cout << "\n enter first string\n";

  cin.getline(str1, 25);

  cout << "\n enter second string\n";

 cin.getline(str2, 25);

strcat(str2, str1);

int len = strlen(str2);

cout.write(str2, len);

return 0;

}

What will be the output of the following C++ code?

class complex{

double re;

double im;

public:

complex() : re(1), im(0.5){}

bool operator==(complex &rhs);

operator int(){}

};

bool complex::operator == (complex &rhs){

if((this->re == rhs.re) && (this->im == rhs.im))

return true;

else

return false;

}

int main(){

complex c1;

cout << c1;

}

Below is the code for for printing the frequency of each element of an array:

#include <bits/stdc++.h>

using namespace std;

int main() {

    map<int,int> mp;

    int n;

    cin>>n;

    int arr[n];

    for(int i=0;i<n;i++){

        cin>>arr[i];

        mp[arr[i]]++;

    }

    for(auto it=mp.begin();it!=mp.end();it++){

        cout<<it->first<<" "<<it->second<<"\n";

    }

return 0;

}

What is the time complexity?