View Compilation Error

0_0_39342708_3051.cpp: In function 'int main()':
0_0_39342708_3051.cpp:4:15: error: 'scanf' was not declared in this scope
    4 |         while(scanf("%d %d %d %d",&x1,&y1,&x2,&y2)!=EOF){
      |               ^~~~~
0_0_39342708_3051.cpp:4:53: error: 'EOF' was not declared in this scope
    4 |         while(scanf("%d %d %d %d",&x1,&y1,&x2,&y2)!=EOF){
      |                                                     ^~~
0_0_39342708_3051.cpp:1:1: note: 'EOF' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
  +++ |+#include <cstdio>
    1 | int main(){
0_0_39342708_3051.cpp:5:21: error: 'pow' was not declared in this scope
    5 |                 sum=pow((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2),0.5);
      |                     ^~~
0_0_39342708_3051.cpp:6:17: error: 'printf' was not declared in this scope
    6 |                 printf("%.2lf\n",sum);
      |                 ^~~~~~
0_0_39342708_3051.cpp:6:17: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?