Having Problems with while - CodeForces 1A-CodePudding

I am having problems with the while function on the C programming language. It runs too many times, Ignoring the end condition.

#include <stdio.h>

int main()
{
    long long int lenX,lenY,cube,needX,needY,i,t = 0;
    scanf("%lld%lld%lld", &lenX,&lenY,&cube);
    while (needX <= lenX)
    {
        needX   cube;
        i  ;
    }
    while (needY <= lenY)
    {
        needY   cube;
        t  ;
    }
    printf("%lld\n",i*t);
    return 0;
}

When inputting 6 6 4(the answer should be 4) the output ranges from -8519971516809424873 to 0.

I'm sorry if I missed something obvious. I'm new to the C programming language

EDIT: It doesn't care about the numbers

#include <stdio.h>

int main()
{
    long long int lenX,lenY,cube,needX,needY;
    scanf("%lld%lld%lld", &lenX,&lenY,&cube);
    while (needX*cube <= lenX)
    {
        needX = 574973;
    }
    while (needY*cube <= lenY)
    {
        needY = 4057348;
    }
    printf("%lld %lld %lld\n",needX*needY,needX,needY);
    return 0;
}

Still outputs:409600 100 4096

CodePudding user response：

These expression statements

    needX   cube;

and

    needY   cube;

have no effect.

It seems you mean

    needX  = cube;

and

    needY  = cube;

Pay attention to that the variables needX, needY i were not initialized that results in undefined behavior..

This declaration

long long int lenX,lenY,cube,needX,needY,i,t = 0;

initializes to zero only the variable t.

You need to rewrite the declaration at least like

long long int lenX,lenY,cube,needX = 0,needY = 0,i = 0,t = 0;