i got an error saying this.

Question

main21.cpp: In function ‘int main()’:

main21.cpp:49:26: error: ‘maxlength’ was not declared in this scope

if(qLength>maxLength) maxlength = qLength;

=================================

inline

float floatRand()

{

return ( ((float)rand()) / ((float)RAND_MAX) );

} // end floatRand

int main(void)

{

float item;

Queue q;

int qLength, maxLength; // added for exercise 7

int total; // added for exercise 8

// Initialize the random number generator.

srand((unsigned)time(NULL)); // srand(0) would make results easier to grade

// srand((int) getpid()); // *** replaced by above non-UNIX-specific line

// loop and total for exercise 8

total = 0;

for (int testRun = 0; testRun < 25; testRun++)

{

// Generate 100 random floats between 0 and 1. If the number

// is less than 0.5, it is put into the queue. If the number

// is 0.5 or greater, a number is removed from the queue.

qLength = 0;

maxLength = 0;

for (int i=0; i<100; ++i)

{

item = floatRand();

if (item < 0.5)

{

q.enqueue(item);

qLength++; // need to add two lines for exercise 7

if(qLength>maxLength) maxlength = qLength;

}

else

{

if (!q.qEmpty())

{

item = q.dequeue();

qLength--; // need to add one line for exercise 7

}

}

}

cout<<"Maximum Length of the queue is : "<<maxLength; // need to add one line for exercise 7 for printing

// need to add one line for exercise 8 for calculating total

while(!q.qEmpty())item = q.dequeue(); // clear out queue

}

// add one line for exercise 8 so as to print average maxiumum length

return 0;

} // end main

Answer 1

You declared maxLength, but

did not declare maxlength.

The C language is case sensitive -- those two are two different identifiers.