C语言：程序为变量x,y,z赋初值2.5，然后在屏幕上打印这些变量

Question

下面程序为变量x,y,z赋初值2.5，然后在屏幕上打印这些变量。程序中存在错误，请改正错误，并写出程序的正确.
#include<stdio.h>
main()
{
printf("These values are:\n'");
int x=y=2.5;
printf("x=%d\n",x);
printf("y=%d\n",y);
printf("z=%d\n",z);
}

Answer 1

#include<stdio.h>
main()
{
printf("These values are:\n'");
float x,y,z;x=y=z=2.5;
printf("x=%f\n",x);
printf("y=%f\n",y);
printf("z=%f\n",z);
}

Answer 2

void main
int x=2.5,y=2.5;z=2.5;

Answer 3

int x=2.5,y=2.5;z=2.5;

Answer 4

#include <stdio.h>
main()
{
float x=2.5,y=2.5,z=2.5;
printf("These values are:\n");
printf("x=%f\n",x);
printf("y=%f\n",y);
printf("z=%f\n",z);
}

Answer 5

float x=2.5,y=2.5,z=2.5;