R7.4Explain the mistakes in the following code. Not all lines contain mistakes. Each line depends on the lines preceding it. 1 double a = 1000; 2 double* p = a; 3 int* p = &a; 4 double* q; 5 *q = 2000; 6 int* r = nullptr; 7 *r = 3000;

C++ Code:  Write a program that finds word differences between two sentences. The input begins with an integer indicating the number of words in each sentence. The next input line is the first sentence and the following input line is the second sentence. Assume that the two sentences have the same number of words and no more than 20 words each. The program displays word pairs that differ between the two sentences. One pair is displayed per line. Ex: If the input is: 6 Smaller cars get better gas mileage Tiny cars get great fuel economy then the output is: Smaller Tiny better great gas fuel mileage economy Add a function named ReadSentences to read the input sentences into two string vectors. void ReadSentences(vector<string>& sentence1Words, vector<string>& sentence2Words, int wordCount) main() already contains code to read the word count and call ReadSentences(). Complete main() to display differing word pairs.

Q5: Correct the following code fragment and what will be the final results of the variable a and b class A {protected int x1,y1,z; public: A(a, b,c):x1(a+2),y1 (b-1),z(c+2) { for(i=0; i<5;i++) x1++;y1++;z++;}}; class B {protected: int x,y; public: B(a,b):x(a+1),y(b+2) { for(i=0; i<5;i++) x+=2; y+=1;}}; class D:public B, virtual public A { private: int a,b; public: D(k,m,n): a(k+n), B(k,m),b(n+2),A(k,m,n) { a=a+1;b=b+1;}); int main() {Dob(4,2,5);)

cout << setw(20) << this->words[i].getWord() << "\t" << this->words[i].getFrequency() << endl;    This code keeps giving me errors "class word have no member getfrequency"