Question

Write a fragment of code that reads in integers from standard input, until end-of-file and sends their (floating point ) average to standard output . If no numbers are input, the message "no values to average" is printed instead (while loops , end-of-file processing, mixed-mode arithmetic, basic conditional )

Answer 1

Answer:

Following are the fragment of code which is written in C++   Programming Language:

float number1=-1;  // variable declaration float type

float count1=0;  // // variable declaration float type

float sum1=0;  // // variable declaration

while(cin.eof( )==false)  // iterating the loop

{

cin >> number1;  // read the number by user

sum1 += number1;  // performing sum operation

count1++;  // increment of count by 1

}

if(number1==-1)  // checking condition

{

cout << "no values to average";

}

else

{

if (count1 > 0 )

cout << sum1/count1;  

}

Explanation:

Here, set three float data type variable "number" to 1, "count" to 0 and "sum" to 0. Then, we set the while loop, pass the condition                 "cin.eof( )==false". Then, we set the if statement, pass the condition "number==-1" and then, we set the else statement, inside it pass if statement.