我一直从我的方程中得到零，不知道为什么

Question

Here is my full code. I keep getting zero for my equations no matter what i do. Any help would be greatly appreciated.

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

int main(void)
{
int x, y;
float a,t;
//Inputs
printf("What is the speed that the jet is traveling in km/hr? \nWhat is the distance traveled in meters? \n");
scanf("%d , %d", &x, &y );


//Calculations

a = x * 1 / 60 * 1 / 60 * 1 / 60 * 1000 ;

t = sqrt( y * a / 2  ) ;

//Outputs
printf("The acceleration of the jet is %f meters per second squared. \n", a);
printf("The time it takes for the jet to reach takeoff speed is %f seconds. \n", t);

return 0;
}

Answer 1

Your first equation is equivalent to

a = ((((((x * 1) / 60) * 1) / 60) * 1) / 60) * 1000;

ie;

a = (x/(60*60*60)) * 1000;

or

a = (x/(216000)) * 1000;

Even though your a is a float, RHS of your equation is doing integer division.

Hence any value less than 216000 assigned to x will result in 0.