EXEC SQL BEGIN DECLARE SECTION; char sqlstring [200] char SNO[7]; float GRADE; short GRADEl char GIVENCNO [6] EXEC SQL END DECLAR SECTION; char orderby [150]; strcpy (sql str ing,"SELECT SNO,GRADE FROM SC WHERE CNO=c");EXEC SQL BEGIN DECLARE SECTION； char sqlstring[200]; char SNO[7]; float GRADE; short GRADEI char GIVENCNO[6]; EXEC SQL END DECLAR SECTION; char orderby[150]; strcpy(sqlstring,"SELECT SNO,GRADE FROM SC WHERE CNO= :c");