почему не работает?

#include <stdio.h>
#include <cmath.h>
int main(int argc,char *argv)
{
float x,y;
printf("input x y");
scanf("% f % f",& x, & y);
printf("z=% f+i% f",sqrt(x*x+y*y)*cos(atan(y/x)),sqrt(x*x+y*y)*sin(atan(y/x));
return 0;
}

#include <stdio.h>
#include <cmath.h>
int main(int argc,char *argv)
{
float x,y;
printf("input x y");
scanf("%f%f",&x,&y);
printf("z=%f+i%f",sqrt(x*x+y*y)*cos(atan(y/x)),sqrt(x*x+y*y)*sin(atan(y/x));
return 0;
}

#include <stdio.h>
#include <cmath.h>
int main(int argc,char *argv)
{
float x,y;
printf("input x y");
scanf("%f",&x);scanf("%f",&y);
printf("z=%lf+i%lf",sqrt(x*x+y*y)*cos(atan(y/x)),sqrt(x*x+y*y)*sin(atan(y/x));
return 0;
}

#include <stdio.h>
#include <math.h> 
int main(int argc,char *argv)
{
float x,y;
printf("input x y");
scanf("%f",&x);scanf("%f",&y);
printf("z=%lf+i%lf",sqrt(x*x+y*y)*cos(atan(y/x)),sqrt(x*x+y*y)*sin(atan(y/x));
return 0;
}