Language: C++

#include<stdio.h>
int main() {
	int r;
	double a = 3.14159265359,w,n;
	scanf("%d", &r);
????????????w=a*r*r;
        n=2*a*r;
	printf("%f %f\n",w ,n );
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:1: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      | ^
a.cc:6:2: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |  ^
a.cc:6:3: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |   ^
a.cc:6:4: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |    ^
a.cc:6:5: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |     ^
a.cc:6:6: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |      ^
a.cc:6:7: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |       ^
a.cc:6:8: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |        ^
a.cc:6:9: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |         ^
a.cc:6:10: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |          ^
a.cc:6:11: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |           ^
a.cc:6:12: error: expected primary-expression before '?' token
    6 | ????????????w=a*r*r;
      |            ^
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token
a.cc:6:20: error: expected ':' before ';' token
    6 | ????????????w=a*r*r;
      |                    ^
      |                    :
a.cc:6:20: error: expected primary-expression before ';' token