View Compilation Error

0_0_22273732_2038.cpp: In function 'int main()':
0_0_22273732_2038.cpp:11:21: error: 'strcmp' was not declared in this scope
    if(strcmp(a, x[i]) == 0)
                     ^
0_0_22273732_2038.cpp:13:21: error: 'strcmp' was not declared in this scope
    if(strcmp(b, x[i]) == 0)
                     ^