am having problem here with my code Plz Help me Here:

if((strcmp("-1", argv[1])==0) || (strcmp("-w", argv[1])==0))

strcpy(&File_na me[0],argv[2]);

else

strcpy(&File_na me[0],argv[1]);

Am getting this:
warning: incompatible implicit declaration of built-in function 'strcpy'....... ......

And THis ERROR:
...