View Compilation Error

0_0_31943597_1696.cpp:3:11: error: '::main' must return 'int'
 void main()
           ^
0_0_31943597_1696.cpp: In function 'int main()':
0_0_31943597_1696.cpp:9:22: error: invalid operands of types 'const char [6]' and 'int' to binary 'operator&'
 while(~scanf("%d%d,"&n,&m))
                      ^