View Compilation Error

0_0_31931655_19039.cpp: In function 'int main()':
0_0_31931655_19039.cpp:7:3: error: '_int64' was not declared in this scope
   _int64 c, a,b,d,e;
   ^
0_0_31931655_19039.cpp:8:8: error: 'a' was not declared in this scope
   cin>>a>>b;
        ^
0_0_31931655_19039.cpp:8:11: error: 'b' was not declared in this scope
   cin>>a>>b;
           ^
0_0_31931655_19039.cpp:9:3: error: 'c' was not declared in this scope
   c=a+b;
   ^
0_0_31931655_19039.cpp:11:4: error: 'd' was not declared in this scope
    d=c%10;
    ^
0_0_31931655_19039.cpp:12:4: error: 'e' was not declared in this scope
    e=c/10%10;
    ^