3.

#include "stdio.h"

#include "math.h"

int main(int argc, char* argv[]) {

 float x,y;

 scanf("%f%f",&x,&y);  

printf("z=%d\n",(int)(x+1/fabs(y)));  

printf("z=%15.6f\n",x+1/fabs(y));

 printf("z=%e\n",x+1/fabs(y));

 return 0;

}