# lab4.cpp Code Syntax and Algorithm Check

*******************************Actual Code*********************************
#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
#include <cmath>

int biggest(const int, const int, const int);
int gcd(const int, const int);
double round(const double);

int main() {

rand();
srand(time(0));
time(0);

int x, y, z, randOut, srandOut;
cout << "Enter three integers. " << endl;
cin >> x >> y >> z;

cout << "The biggest of " << x << "," << y << ", and " << z << "is " << biggest(x,y,z) << endl;
cout << "The greatest comon divisor of " << x << " and " << y << " is " << gcd(x,y) << endl;
cout << randOut << " is a random number. " << endl;
cout << srandOut << " is a seeded random number. " << endl;
cout << "The rounded number is " << round(floatNum) << endl;

return 0;

}

int biggest(const int x, const int y, const int z) {

int size;
if((x < size) && (y < size) && (z < size))
return size;

}

int gcd(const int x, const int y) {

int remainder = x % y;
if(remainder != 0)
return gcd(remainder, x);
return x;

}

//generate random #, print digits seperated by 5 spaces

double firstDigit = digit;
for(int digit = 4; digit >= 0; digit--)
cout << firstDigit << " ";

return;

}

double round(const double floatNum) {

//round parameter to the nearest int
floor(floatNum);
pow(floatNum,);

}

**************************************************************************************

output:

lab4.cpp: In function `double round(double)':
lab4.cpp:67: parse error before `)'

Description of the problem below:
*************************************************************************************
PART I.
Write function definitions for the following prototypes:

int biggest(const int, const int, const int );
// Returns the largest of three integers.

int GCD( const int, const int );
// returns the greatest common divisor (GCD) of two integers, where GCD is the largest integer that divides both of them evenly.

/* produce a random integer between 1 and 32767 and print it as a series of digits, where each digit is separated by a space; e.g. 4562 should be printed as: 4 5 6 2 (text 3.25(c) pg 244)*/

PART II.
Write the prototype, definition and call for a function that will take a local double from main and round it to its closest integer value; e.g. 3.45 will become 3.00, and any number >= 3.5 will become 4.00. See pg. 242 Exercise 3.13 for help. The function should modify the value of the double in main.

SOLUTION
Axter

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edelossantos

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
#include <cmath>

int biggest(const int, const int, const int);
int gcd(const int, const int);
double round(const double);

int main() {

rand();
srand(time(0));
time(0);

int x, y, z, randOut, srandOut, floatNum;
cout << "Enter three integers. " << endl;
cin >> x >> y >> z;

cout << "The biggest of " << x << "," << y << ", and " << z << "is " << biggest(x,y,z) << endl;
cout << "The greatest comon divisor of " << x << " and " << y << " is " << gcd(x,y) << endl;
cout << randOut << " is a random number. " << endl;
cout << srandOut << " is a seeded random number. " << endl;
cout << "The rounded number is " << round(floatNum) << endl;

return 0;

}

int biggest(const int &x, const int &y, const int &z){
int max = x ;
if ( y > x ) {
max = y ;
}
if ( z > max ) {
max = z ;
}
return max ;
}

int gcd(const int x, const int y) {

int remainder = x % y;
if(x > y) {
remainder = y;
}
if(remainder != 0)
return gcd(remainder, x);
return x;

}

//generate random #, print digits seperated by 5 spaces
int digit;
double firstDigit = digit;
for(int digit = 4; digit >= 0; digit--)
cout << firstDigit << " ";

return;

}

double round(const double floatNum) {

//round parameter to the nearest int
floor(floatNum);
cout << pow(double floatNum);

}

g++

lab4.cpp: In function `double round(double)':
lab4.cpp:72: parse error before `)'

correction>>

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
#include <cmath>

using namespace std;

int biggest(const int, const int, const int);
int gcd(const int, const int);
double round(const double);

int main() {

rand();
srand(time(0));
time(0);

int x, y, z, randOut, srandOut, floatNum;
cout << "Enter three integers. " << endl;
cin >> x >> y >> z;

cout << "The biggest of " << x << "," << y << ", and " << z << "is " << biggest(x,y,z) << endl;
cout << "The greatest comon divisor of " << x << " and " << y << " is " << gcd(x,y) << endl;
cout << randOut << " is a random number. " << endl;
cout << srandOut << " is a seeded random number. " << endl;
cout << "The rounded number is " << round(floatNum) << endl;

return 0;

}

int biggest(const int &x, const int &y, const int &z){
int max = x ;
if ( y > x ) {
max = y ;
}
if ( z > max ) {
max = z ;
}
return max ;
}

int gcd(const int x, const int y) {

int remainder = x % y;
if(x > y) {
remainder = y;
}
if(remainder != 0)
return gcd(remainder, x);
return x;

}

//generate random #, print digits seperated by 5 spaces
int digit;
double firstDigit = digit;
for(int digit = 4; digit >= 0; digit--)
cout << firstDigit << " ";

return;

}

double round(const double floatNum) {

//round parameter to the nearest int
floor(floatNum);
cout << pow(double floatNum);

}

SOLUTION

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>>you haven't assigned any values to the variables you're outputting. And 'biggest()' should be

That's what I first thought too, but he has the following line before calling biggest()
cin >> x >> y >> z;
>>That's what I first thought too, but he has the following line before calling biggest()

Err, that's not what I meant - it is declared to take ints by value, and the implementation uses references. That I tried to point out.

lab4.cpp: In function `int main()':
lab4.cpp:38: parse error before `double'

gcd isn't behaving correctly, I don't think my seed is correct.

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
#include <cmath>

using namespace std;

int biggest(const int, const int, const int);
int gcd(const int, const int);
double round(const double);

int main() {

rand();
srand(time(0));
time(0);

int x, y, z, randOut, srandOut, floatNum;
unsigned seed;
srand(seed);

for(int counter = 1; counter <= 10; counter++) {
cout << setw(10) << (1 + rand() % 6);
if(counter % 5 == 0)
cout << endl;

}
cout << "Enter three integers. " << endl;
cin >> x >> y >> z;

cout << "The biggest of " << x << "," << y << ", and " << z << "is " << biggest(x,y,z) << endl;
cout << "The greatest comon divisor of " << x << " and " << y << " is " << gcd(x,y) << endl;
cout << randOut << " is a random number. " << endl;
cout << srandOut << " is a seeded random number. " << endl;
cout << "The rounded number is " << round(const double floatNum) << endl;

return 0;

}

int biggest(const int x, const int y, const int z){
int max = x ;
if ( y > x ) {
max = y ;
}
if ( z > max ) {
max = z ;
}
return max ;
}

int gcd(const int x, const int y) {

int remainder = x % y;
if(x > y) {
remainder = y;
}
if(remainder != 0)
return gcd(remainder, x);
return x;

}

//generate random #, print digits seperated by 5 spaces
int digit;
double firstDigit = digit;
for( digit = 4; digit >= 0; digit--)
cout << firstDigit << " ";

return;

}

double round(const double floatNum) {

double tmp = floatNum+ 0.5;

const double n = floatNum;

return (double) n;

}