一个用strlen ,sprintf 错误

test.c:40: warning: passing arg 1 of `sprintf' makes pointer from integer without a cast
test.c:46:
 warning: passing arg 1 of `strlen' makes pointer from integer without a cast
是这样的，我定义了一个二维字符数组：
 char bluetooth_info[5][20] = { '\0' };
在用strlen() sprintf()时，
 1

while( pch != NULL )
sprintf( bluetooth_info[index++][20] , "%s" , pch );
 


2

if( strlen( bluetooth_info[2][20] ) == 0 )
   { printf( "can not find device \n" );
     return;
   }


正确的使用应是：sprintf( bluetooth_info[index++], "%s" , pch );
strlen( bluetooth_info[2])
没有[20]才是：！

太低级的错误了