View Compilation Error

0_0_18594698_25362.cpp: In function 'int main(int, const char**)':
0_0_18594698_25362.cpp:24:9: error: '__int64_t' was not declared in this scope
         __int64_t temp;
         ^
0_0_18594698_25362.cpp:25:24: error: 'temp' was not declared in this scope
         scanf("%I64d",&temp);
                        ^