0_0_36872039_26260.cpp: In function 'int main()':
0_0_36872039_26260.cpp:5:47: error: 'scanf' was not declared in this scope
while(scanf(" %d %d %d %d",&x1,&y1,&x2,&y2)!=EOF)
^
0_0_36872039_26260.cpp:5:50: error: 'EOF' was not declared in this scope
while(scanf(" %d %d %d %d",&x1,&y1,&x2,&y2)!=EOF)
^
0_0_36872039_26260.cpp:7:46: error: 'sqrt' was not declared in this scope
l=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)) ;
^
0_0_36872039_26260.cpp:8:25: error: 'printf' was not declared in this scope
printf("%.2f\n",l) ;
^
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