View Compilation Error

0_0_16365241_29643.cpp: In function 'int main()':
0_0_16365241_29643.cpp:4:5: error: 'int64' was not declared in this scope
     int64 a,b,cas=1,i,j;
     ^
0_0_16365241_29643.cpp:5:32: error: 'a' was not declared in this scope
     while(~scanf("%I64d%I64d",&a,&b),a+b)
                                ^
0_0_16365241_29643.cpp:5:35: error: 'b' was not declared in this scope
     while(~scanf("%I64d%I64d",&a,&b),a+b)
                                   ^
0_0_16365241_29643.cpp:7:9: error: 'i' was not declared in this scope
         i=2;
         ^
0_0_16365241_29643.cpp:12:17: error: 'j' was not declared in this scope
                 j=a/i+1;
                 ^
0_0_16365241_29643.cpp:22:17: error: 'j' was not declared in this scope
                 j=a/i;
                 ^
0_0_16365241_29643.cpp:31:39: error: 'cas' was not declared in this scope
         printf("Case #%I64d: %I64d\n",cas++,a);
                                       ^