范围没有宣布,初学者蜗牛竞速游戏
好吧,我用Google搜索,并在这里找到一些答案在本网站关于这一点,但答案是太不一样了,我真的它们做任何事情,所以我再问一次,希望为最好。范围没有宣布,初学者蜗牛竞速游戏
我用g ++下面的错误;
snailrace.cpp: In function ‘int race(int, int)’:
snailrace.cpp:101:21: error: ‘rand’ was not declared in this scope
snailrace.cpp:123:3: error: a function-definition is not allowed here before ‘{’ token
snailrace.cpp:128:3: error: expected ‘}’ at end of input
我想我一定能解决所有问题,除了snailrace.cpp:101:21: error: ‘rand’ was not declared in this scope
我都试过了,它不会帮助! 我该如何解决这个问题!?这让我疯狂。 谢谢!
//The snail race.
#include <iostream>
#include <ctime>
//Function declaration.
int race(int,int);
void race(void);
int menu(void);
int placebet(int);
void init(void);
//Variables
int money = 200;
//the main function
int main(void)
{
using std::cout;
init();
int user_respons;
cout << "Welcome to the snail race!\n";
while(user_respons = menu())
{
switch(user_respons)
{
case 1:
case 2:
case 3:
::money +=
race(placebet(user_respons), user_respons);
break;
case 4: //The user did not bet
race();
break;
}
}
return 0;
}
//Display user menu and sends user selection to the main function
int menu(void)
{
using std::cout;
using std::cin;
int user_respons;
cout << "You have " << money << " USD.\n";
do
{
cout << "Race Menu: \n\n"
<< "1) Bet on snail 1\n"
<< "2) Bet on snail 2\n"
<< "3) Bet on snail 3\n"
<< "4) Do not bet, just watching"
<< "0) Leave the race";
cin >> user_respons;
}
while(user_respons < 0 && user_respons > 4);
return user_respons;
}
//Decide how much one person will bet on a snail.
int placebet(int user_respons)
{
using std::cout;
using std::cin;
int bet_amount;
cout << "Snail " << user_respons << " is a good choice!\n";
cout << "How much would you like to bet on your snail?\n";
cin >> bet_amount;
return bet_amount;
}
//if just watching the race
void race(void)
{
race(0, 0);
}
//if they are betting money.
int race(int money, int user_respons)
{
using std::cout;
using std::cin;
//Stores random number
int winner = rand() % 3 + 1;
cout << "And the snails are off!\n";
cout << "Look at them go! \n";
cout << "The winner snail is " << winner << "\n";
if(winner == user_respons)
{
cout << "You win!\n";
return money * 2;
}
else
{
cout << "You lost.\n";
return money/2;
}
//Handles the program start random
void init(void)
{
using std::srand;
using std::time;
srand(time(0));
}
rand
是cstdlib
一部分,你不包括。添加
#include <cstdlib>
谢谢! #include
没问题,你的蜗牛比赛运气不错,也许考虑随机为真正的蜗牛比赛准备线程! – Joe
呵呵,我总觉得'rand()'出于某种原因在'
您忘记了void init(void)
之前的支架。
int race(int money, int user_respons)
{
/* ... */
else
{
cout << "You lost.\n";
return money/2;
}
} /* <---- missing */
//Handles the program start random
void init(void)
{
using std::srand;
using std::time;
srand(time(0));
}
这可能是由于缩进不一致造成的。
如果你正在使用gcc,那么你必须包括
#include<cstdlib>
这是功课编码?如果是这样,添加一个标签.. –
@ R.MartinhoFernandes不错盐 – Jared
蜗牛赛跑听起来不可思议 –