View Compilation Error

0_0_2960724_28761.cpp: In function `int main()':
0_0_2960724_28761.cpp:7: error: `_int64' undeclared (first use this function)
0_0_2960724_28761.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2960724_28761.cpp:7: error: expected `;' before "bn"
0_0_2960724_28761.cpp:8: error: expected `;' before "tem1"
0_0_2960724_28761.cpp:9: error: expected `;' before "tem2"
0_0_2960724_28761.cpp:13: error: `bn' undeclared (first use this function)
0_0_2960724_28761.cpp:13: error: `tem2' undeclared (first use this function)
0_0_2960724_28761.cpp:13: error: `tem1' undeclared (first use this function)
0_0_2960724_28761.cpp:14: error: `an' undeclared (first use this function)