View Compilation Error

0_0_24395980_21264.cpp: In function 'int main()':
0_0_24395980_21264.cpp:17:30: error: 'strcmp' was not declared in this scope
    if (strcmp(a, shengxiao[i]) == 0)
                              ^
0_0_24395980_21264.cpp:19:30: error: 'strcmp' was not declared in this scope
    if (strcmp(b, shengxiao[i]) == 0)
                              ^