C/C++ :: Printing Square Free Numbers

Feb 27, 2014

I'm currently trying to write a program that takes an integer input from the user and displays that number of square-free numbers. I've gotten most of the program to work, but I encounter an error during the noSquare function that causes it to print incorrectly. I have bolded the area where I believe the problem is what I am doing wrong.

The problem with the program is that it prints ALL numbers from 1 to the input number instead of just the square-free.

A square-free number is a number that is not evenly divisible by the square of any prime number ....

#include <iostream>
#include <vector>
using namespace std;
bool noSquare (int num); //Function to determine if the number is square-free
vector<int> getPrimes(int num); //Function to get a vector of all primes below num
bool isPrime (int number); //Function to determine if individual numbers are prime
int main()

[Code]...

By the way, the in the middle of the code was me trying to bold a section, not an actual part of the code. I can't seem to find where to edit my original post.

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C++ :: Printing Square Free Numbers?

Feb 27, 2014

I'm currently trying to write a program that takes an integer input from the user and displays that number of square-free numbers. I've gotten most of the program to work, but I encounter an error during the noSquare function that causes it to print incorrectly.

A square-free number is a number that is not evenly divisible by the square of any prime number. It's hard to see the bold in the code area, but it begins after the "//I think below is where the problem is"

#include <iostream>
#include <vector>
using namespace std;

[Code]........

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Dec 15, 2014

I have to make a program that displays a square of asterisks based on the users input. Here is what I have so far.

#include<iostream>
using namespace std;
int main(){
int number;
cout << "Enter a number: ";
cin >> number;
for (int i = 0; i < number; i++){

[Code] ....

But the square needs to be hollow like this. So if the user enters 5 then the following square will be shown.

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

How to make it do this.

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C++ :: Display Remainder Of The Square Of Numbers From 100 To 10

Mar 31, 2013

Display the remainder of the square of numbers from 100 to 10. This square of numbers must be divisible by the numbers from 100 to 10 respectively. what i need to in this

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C++ ::  Calculating Sum Of Square Of Numbers Between Two Inputs

Mar 28, 2014

Write a function which takes two parameter of integer type and both parameters are positive integer. These number should be provided by the user of your program. The first parameter is lower than the second parameter. You function should be able to calculate the sum of the square of each of the numbers between the two inputs and should display that. Please write a main function to display the working of your function. Call the function at least three times by using some loop in the main function.

This is what I came up with but it is not correct:

#include <iostream>
using namespace std;
void sumsquares(int number1, int number2) {
int sum = 0;
for(int i = number1; i<number2; i++)
sum =sum+ i*i;
cout<<"The Result is: "<<sum<<endl;

[Code] .....

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C/C++ :: Make Program To Square Numbers From 1 To 20

Oct 21, 2012

I want to make program to square the numbers from 1 to 20. i have written this program, it's running but not giving the required answer.i think it is giving a garbage value...

void main(void)
{int a;
  int  b;
b=a*a;
for (a=1; a<21; a++)
{printf("%d",b);
printf("the square is%d=b");
}
getche();}

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C++ :: Print Square Roots Of Numbers With Rows And Columns

Mar 12, 2013

this is what i have so far

#include <iostream>
#include <cmath>
using namespace std;
int main () {
int v;

[Code] ....

im trying to get the program to print this as an example if the user enters 5 (the rounding of the decimal is optional).

1 1.41 1.73 2 2.24
1 1.41 1.73 2
1 1.41 1.73
1 1.41
1

why its not reading my for loop for rows its only doing columns ...

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Aug 4, 2014

I tried to check the rational or irrational numbers after we take the square root. i dont get the formula. for eg. squareroot of 64 is 8 and it is rational. square root of 2 is irrational. how to check it in c++..

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C++ :: User Input Two Numbers - Calculate Square Root Then Roots Are Added Up To Return Sum

Aug 23, 2014

I have tried writing a code which takes two numbers from the user and calculates their square root then the roots are added up to return the sum. The program is coming out with loads of errors.

#include<iostream>
#include<cmath>
float main(){
using namespace std;
float m1,m2,m3,m4,m5;

[Code] ....

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C/C++ :: Displaying Filled Square Next To Hollow Square?

Feb 28, 2015

I am able to display a filled and hollow square by themselves, but I can't seem to be able to get them side by side.

So this is my code so far:

[/
#include <iostream>
using namespace std;
int main()

[Code]....

I can get the hollow square to show up, but the first square just shows up as a single line instead of a square. It seems that it ignores the first if statement in the second loop. I've tried not using an if statement in the second loop but it didn't seem to work either.

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Oct 25, 2013

I know how to draw a square hollow or filled but i need to draw an alternating pattern ....

ex
iPatternHeight = 1
X

iPatternHeight = 3
OOO
OXO
OOO

[Code] .....

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C++ :: Printing 10 Numbers Per Line?

Nov 3, 2013

I'm working on a program that prints every even number from 100 to 200. How i would be able to print 10 numbers per line?

Code:
#include <iostream>
using namespace std;
int main()
{
int x;
for (x=100; x<=200; x++)
cout <<x++<< endl;
system("pause");
return 0;
}

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C++ :: Printing Unspecified Set Of Numbers?

May 8, 2014

how are we able to print out a random number (after using srand() and rand() ) - where you there is an unspecified amount of variables given. So, if the user selects yes to have another number given, how are we able to show the previous numbers and the current one?

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C :: Printing 21 Different Numbers That Are Randomly Generated?

Mar 2, 2014

The program is supposed to be printing 21 different numbers that are randomly generated. Why am I getting the same number 21 times? Using dev C++ compiler.

Code:

/*prints random numbers between 1 - 99*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

[Code]......

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C++ :: Printing Even And Odd Numbers In Alternating Pattern?

Nov 23, 2014

We never really had a thorough discussion yet about if-else statements and while.. but our teacher already gave us a difficult assignment..

We should write a program the accepts a number , n, and displays the first n values of the number series:

the pattern to be print was like this 1 1 2 3 4 5 8 7 16 9 32 11 64 13...

alternating odd and even numbers using while and if-else statements

if you input n, the output will print only until 1 1 2 3 4 5 8 7

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C++ :: Printing The First N Prime Numbers (user Input)

Jan 15, 2014

//Finding prime numbers
#include <iostream>
using namespace std;

[Code]....

/*The program currently prints all the prime numbers up to n (For example, if 7 is entered, it prints out: 1, 2, 3, 5, 7. What I want it to do, is print out the first 7 numbers; 1, 2, 3, 5, 7, 11, 13.

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Visual C++ :: Printing 2 Arrays With 10 Numbers Per Line

Jan 14, 2014

i got 2 arrays, how would i print 10 numbers per line, so that would be 5 numbers from each array.

array1[40];
array2[40];

array1 array2// array1 array2// array1 array2 // array1 array2 // array1 array2
array1 array2// array1 array2// array1 array2 // array1 array2 // array1 array2
array1 array2// array1 array2// array1 array2 // array1 array2 // array1 array2

...... and so on

how can i put this in a loop?

and so on but there are 80 elements so i cant go one by one.

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Oct 25, 2013

I know how to draw a square hollow or filled but I need to draw an alternating pattern

ex
iPatternHeight = 1
X

iPatternHeight = 3
OOO
OXO
OOO

[Code] ......

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Jul 7, 2014

Code:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
/* h(a)=abcab,h(b)=acabcb,h(c)=acbcacb */
void h_i(int i, char *w, char *a, char *b, char *c)

[Code] .....

Above program increases string like this example.

Let say h(0)=01 and h(1)=10 and let say our first string is w=0 h(w)=01, h^2(w)=0110 h^3(w)=01101001..etc.

We have used h map, which is given in the program comment statement. Same thing, program is doing for three letters. These three letters we have passed as argument in h_i function. e.g. h_i(2,w,"a","d","g") function will apply the 3 letter map h(definition is given in commented form in program) 2 times on string w.

In program w=a; and three letters are a, d and g. /* h(a)=abcab,h(b)=acabcb,h(c)=acbcacb */ here b=d and c=g.

Above program gives core dump at free(w2) free(w1). if we remove these free statements then it gives correct answer. But, we want to free w1 and w2 in the above code. How can we make free both w1 and w2 strings?

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C :: Way To Free Unsigned Pointer Array In Best Way

Feb 24, 2013

how is the best way to free unsigned pointer array allocated with cmallc?

Code:

uint8_t *buf;
buf = cs_calloc(ca->len + 13);

i do like this , but i know this is not quite right , since i got compile warning passing argument 1 of ‘free’ makes pointer from integer without a cast

Code:

for (i = 0; i < ca->len + 13; i++)
{
free(buf[i]);
buf[i] = NULL;
}

free(buf); do i need to free each element of array like above?

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Jan 8, 2014

This compiles o.k.:

Code:

int main(void){
char *a;
a = (char*) malloc (100*sizeof(char));

[Code]....

I get an error saying "pointer being freed was not allocated". This happens for free(a), free(*a), free(&a), free(&*a).

So if I no longer need "1234567"... how do I get rid of this memory element?

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Mar 16, 2014

I'm trying to free allocated memory for structure. It seems like free() gets only pointer and not regular types . my question is basic and simple – is passing pointer to free() frees the pointer or the variable it points at? or both?

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C :: Detect CPU Usage And Free RAM On Windows X86 In C?

Feb 20, 2015

I don't use Visual Studio and/or C++ so I would like to do it without them. I found this article c++ - How to determine CPU and memory consumption from inside a process? - Stack Overflow

I tried some lines of code but no one works for me.

Code:

#include "windows.h"
typedef struct _MEMORYSTATUSEX {
DWORD dwLength;

[Code]....

These was just my first tries to work with da MEMORYSTATUSEX.

I would like to find out if there is free memory at least ... (some value) and similar.

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C++ :: Member Variables On Stack Or Free Store?

Feb 18, 2014

I'm struggling with the whole stack/heap thing. I totally see the need to create objects on the free store to outlive functions, however, I don't see the purpose of "new" when working with classes.

Code:
class Person{
public:
Person(std::string strName, int number);
~Person(void);

Resource r;

[Code] .....

Now, what is the difference? Why would I need to create a Resource on the free store? Both variables named r live until the destructor runs, right?

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C :: Malloc Is Used To Allocate Free Memory To A Pointer

Nov 5, 2014

There is a part in the lesson that explains how malloc is used to allocate free memory to a pointer and gives us 2 examples:

Code:

float *ptr = malloc( sizeof(*ptr) ); and Code: float *ptr;
ptr = malloc( sizeof(*ptr) );

From my logic in the first case we allocate the memory to *ptr and in the second to ptr.

It's a bit confusing, am I missing something?

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C :: Free Not Working After Malloc Was Used To Allocate Memory

Jun 13, 2014

Consider this program:

Code:

// sb_string class v1.04

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct sb_string {

[Code] ....

And here is the output I got:

Code:
[harshvardhan@hari-rudra] ~/Desktop% gcc49 -o test test.c
[harshvardhan@hari-rudra] ~/Desktop% ./test
-before Value of len = 1
(in_function)-before Value of len = 1
(in_function)-after Value of len = 1

-after Value of len = 1 I was trying to make a little easier to work with string. Once the memory is allocated by malloc via sb_init() function, the sb_massacre function wasn't working to deallocate the memory. I had used multiple versions of gcc and clang but the result is same.

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