C PROGRAMING THANK YOU What is the output of the code fragme

C++ PROGRAMING. THANK YOU

What is the output of the code fragment below. Explain your answer. Char str[] = \"CTGAACTGCGTCATCAGTATGCGCATGCATCT\"; int n=0; while(str[n] !=\'\\0\') n +=1; int a=0; for (int i=0;i

Solution

#include <iostream>
using namespace std;
int main()
{
char str[] = \"CTGAACTGCGTCATCAGTATGCGCATGCATCT\";   //Initializes a character array.
int n = 0;           //Initializes n to 0. Loop variable.
while(str[n] != \'\\0\')   //Starting from first character till the last character in the string str.
n += 1;               //Everytime increment the n value.
//By now, n is the count of number of characters in the string.
int a = 0;       //Initializes a to 0.
for(int i = 0; i < n; i++)   //For each character in the string.
{
if(str[i] == 0x47 || str[i] == 65)   //If the string character is either G or A. (These are the ASCII values 0x47 in hex representation of G, and 65 is decimal representation of A)
a++;           //Increment the counter a.
}
cout<<a<<endl; //This prints the value of a. This program prints the total number of A\'s and G\'s in the specified string.
}