View Compilation Error

0_0_36471523_10722.cpp:3:11: error: '::main' must return 'int'
 void main()
           ^
0_0_36471523_10722.cpp: In function 'int main()':
0_0_36471523_10722.cpp:10:32: error: expected '}' at end of input
 printf("两点间的距离为%.2f", d);
                                ^