在Prolog中,可以使用if-then-else结构来实现条件语句。下面是一个简单的示例: % 定义条件语句conditional_statement(X, Y) :- X >10, Y is X *2.conditional_statement(X, Y) :- X =<10, Y is X +2. % 测试条件语句 test :-conditional_statement(5, Y),write('Y is '),write(Y), nl. tes...
问带有"or“条件的Prolog if/else语句EN条件语句中的else 什么是else else 就是对于if条件不满足的时候...
从Entity Framework 4开始在ObjectContext对象上提供了2个方法可以直接执行SQL语句：ExecuteStoreQuery<T> ...
% The value of an anonymous var is not output % Check if any males exist in the database : male(_). = yes % --- WHERE IS IF? --- % You can use a type of case statement instead what_grade(5) :- write('Go to kindergarten'). what_grade(6) :- write('Go to first grade'...
if(n == 1|| n == 2){return1;}else{returnfun(n-1) + fun(n-2) ;}}publicstaticvoidmain(String[] args) {for(inti = 1; i <= 15; ++i)System.out.println(fun(i));}}编写代码(递推)static int fun2(int n){int a[] = new int[20] ;...
if (numberOfDiscs == 1) return 1; else return 1 + 2 * moves(numberOfDiscs - 1); } public static void main(String [] args) { for(int n = 1; n <= 64; n++) System.out.printf("%3d\t%,d\n", n, moves(n)); }
Language: Improved procedure check for number ranges (e.g. [1..3]) if-then-else expression (in addition to the existing if-then-else statement) The condition in an if-then-else now contains an implicit cut, and thus allows non-deterministic condition [ Visual Prolog full changelog ] ...
%token MAIN IF ELSE WHILE TYPE %type EXPR ASSIGNMENT CONDITION IFST ELSEST WHILELOOP %left '-' '+' %left '*' '/' %% PROGRAM:MAIN BLOCK ; BLOCK:'{'CODE'}' ; CODE:BLOCK |STATEMENT CODE |STATEMENT ; STATEMENT:DESCT';' |ASSIGNMENT...
It]"/8.*"*/"[\t]*|n main_function *[a-zA-Z]+"(".*")"[|*\n datatype "+"|"-"|"*"|"/" terminator ":" bracketl operator bracket2 loop relational1 [*"&&"l" *"}"[\t]* t "if("*"'Nt]*"else"I[t ]*"for"|[t ]*"while"|It ]*"do" ...
statement: expression{printf("\nResult:%d\n", $1); } |VARIABLE'='expression{ sym[$1-'a']=$3; printf("\n%c = %d\n", $1, $3); } ; expression: INTEGER{$$=$1;} |VARIABLE{ if(sym[$1-'a']!=-1){ $$=sym[$1-'a']; ...