View Compilation Error

0_0_26386350_2510.cpp:9:8: error: empty character constant
 printf('');
        ^
0_0_26386350_2510.cpp:2:11: error: '::main' must return 'int'
 void main()
           ^
0_0_26386350_2510.cpp: In function 'int main()':
0_0_26386350_2510.cpp:5:26: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
 while(scanf('%d %d',&a,&b)!=EOF)
                          ^
In file included from 0_0_26386350_2510.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:386:15: note: initializing argument 1 of 'int scanf(const char*, ...)'
   int __cdecl scanf(const char * __restrict__ _Format,...) __MINGW_ATTRIB_DEPRECATED_SEC_WARN;
               ^
0_0_26386350_2510.cpp:8:16: error: invalid conversion from 'int' to 'const char*' [-fpermissive]
 printf('%d',sum);
                ^
In file included from 0_0_26386350_2510.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/stdio.h:378:15: note: initializing argument 1 of 'int printf(const char*, ...)'
   int __cdecl printf(const char * __restrict__ _Format,...);
               ^