View Compilation Error

0_0_24381496_13787.cpp: In function 'int main()':
0_0_24381496_13787.cpp:14:21: error: 'strcmp' was not declared in this scope
    if(strcmp(x, p[j]) == 0) a = j;
                     ^
0_0_24381496_13787.cpp:15:21: error: 'strcmp' was not declared in this scope
    if(strcmp(y, p[j]) == 0) b = j;
                     ^