View Compilation Error

0_0_16762080_12485.cpp:1:11: error: '::main' must return 'int'
 void main(){
           ^
0_0_16762080_12485.cpp: In function 'int main()':
0_0_16762080_12485.cpp:2:7: error: 'scanf' was not declared in this scope
 while(scanf!=EOF)
       ^
0_0_16762080_12485.cpp:2:14: error: 'EOF' was not declared in this scope
 while(scanf!=EOF)
              ^
0_0_16762080_12485.cpp:4:18: error: 'i' was not declared in this scope
   scanf("%d,%d",&i,&j);
                  ^
0_0_16762080_12485.cpp:4:21: error: 'j' was not declared in this scope
   scanf("%d,%d",&i,&j);
                     ^
0_0_16762080_12485.cpp:4:22: error: 'scanf' was not declared in this scope
   scanf("%d,%d",&i,&j);
                      ^
0_0_16762080_12485.cpp:5:22: error: 'printf' was not declared in this scope
   printf("/n i+j",i+j); 
                      ^