View Compilation Error

0_0_34221993_6207.cpp:1:2: error: stray '#' in program
 z#include<bits/stdc++.h>
  ^
0_0_34221993_6207.cpp:1:1: error: 'z' does not name a type
 z#include<bits/stdc++.h>
 ^
0_0_34221993_6207.cpp: In function 'int main()':
0_0_34221993_6207.cpp:7:41: error: 'scanf' was not declared in this scope
   while(scanf(" %d %d %d %d",&a,&b,&c,&d)!=EOF)
                                         ^
0_0_34221993_6207.cpp:7:44: error: 'EOF' was not declared in this scope
   while(scanf(" %d %d %d %d",&a,&b,&c,&d)!=EOF)
                                            ^
0_0_34221993_6207.cpp:9:14: error: 'abs' was not declared in this scope
     x=abs(a-c);
              ^
0_0_34221993_6207.cpp:12:13: error: 'sqrt' was not declared in this scope
     s=sqrt(s);
             ^
0_0_34221993_6207.cpp:13:23: error: 'printf' was not declared in this scope
     printf("%.2lf\n",s);
                       ^