View Compilation Error

0_0_12858124_25813.cpp: In function `int main()':
0_0_12858124_25813.cpp:6: error: `__int128' undeclared (first use this function)
0_0_12858124_25813.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12858124_25813.cpp:6: error: expected `;' before "A"
0_0_12858124_25813.cpp:7: error: `C' undeclared (first use this function)