View Compilation Error

0_0_21247157_7298.cpp: In function 'int main()':
0_0_21247157_7298.cpp:17:32: error: 'strcmp' was not declared in this scope
             if(strcmp("Caps", a) == 0)  
                                ^
0_0_21247157_7298.cpp:25:33: error: 'strcmp' was not declared in this scope
             if(strcmp("Shift", a) == 0)  
                                 ^