嗨,我对问题的帮助不大!
我有一个包含循环的主类。 在这个循环中,用户可以调用不同的函数来执行不同的操作,但我希望如果用户选择某个函数,它会显示一条消息并且循环结束。
这是我的代码:
#include <stdio.h>
void rest_at_inn();
void train();
void battle_demon_lord();
void Quit_Game();
int main() {
//Declare variable and pointer
float days_remaining = 8;
int current_hp = 10;
int hp_remaining = 10;
int MAX = 10;
int experience = 0;
int selection;
//Loops a menu that asks the user to make a selectio and repet it until either days or HP are less or equal to zero
do {
printf("Days remaining: %f, HP: %d, EXP: %d\n\n", days_remaining, hp_remaining, experience);
printf("1 - Rest at Inn\n");
printf("2 - Train\n");
printf("3 - Fight the Demon Lord\n");
printf("4 - Quit Game\n\n");
printf("Select: \n");
scanf("%d", &selection);
printf("\n");
//Execute the selection
switch (selection) {
case 1:
rest_at_inn(&days_remaining, &hp_remaining, &MAX);
break;
case 2:
train(&days_remaining, &hp_remaining, &experience);
break;
case 3:
battle_demon_lord(¤t_hp);
break;
case 4:
Quit_Game();
break;
}
} while (days_remaining > 0 && current_hp > 0);
return 0;
}
//This function reduces the days by 1 and resets the HP to 10
void rest_at_inn(float *days_remaining, int *hp_remaining, int *MAX) {
*hp_remaining = 10;
*days_remaining -= 1;
if (*days_remaining > 0)
printf("You rested up the at the inn\n\n");
else /*(*days_remaining<=0)*/
printf("Game Over");
}
//This function reduces the days by 0.5 and the HP by 2 and adds 10 to the experience
void train(float *days_remaining, int *hp_remaining, int *experience) {
*experience += 10;
*hp_remaining = *hp_remaining - 2;
*days_remaining = *days_remaining - 0.5;
printf("You did some training!\n\n");
}
//This function sets the HP to 0 and prints a string
void battle_demon_lord(int *current_hp) {
*current_hp = 0;
printf("He's too strong!\n\n");
printf("Game Over!");
}
// This function prints a string
void Quit_Game() {
printf("Good bye!\n\n");
}
我认为它应该是do_while中的一个参数,但没有任何对我有用。
答案 0 :(得分:4)
您需要在用户选择4时添加退出条件。
你可以这样做:
} while (days_remaining>0 && current_hp>0 && selection != 4);
或者这个:
case 4 :
Quit_Game();
return 0;
或者这个:
void Quit_Game() {
printf ("Good bye!\n\n");
exit(0);
}
答案 1 :(得分:2)
如果switch
是循环的最后一个语句,请在mustQuit
/ do
循环的do
之前添加while
标志变量,并且将其设置为零。当最终用户选择退出选项时,请将mustQuit
设置为1
。将!mustQuit
条件添加到循环中。
int mustQuit = 0;
do {
... // some statements here
switch (selection) {
...
case 4 :
mustQuit = 1;
Quit_Game();
break;
}
} while (!mustQuit && days_remaining > 0 && current_hp > 0);
如果您在switch
之后有更多陈述,则中间带有条件break
的替代方案可能更为理想:
do {
int mustQuit = 0;
... // some statements here
switch (selection) {
...
case 4 :
mustQuit = 1;
Quit_Game();
break; // this breaks the switch
}
if (mustQuit) {
break; // this breaks the loop
}
... // More statements here
} while (days_remaining > 0 && current_hp > 0);
答案 2 :(得分:0)
我希望你想要逃避case 4
中的循环:
尝试使用goto
case 4 :
Quit_Game();
goto out;
break;
}
} while (days_remaining>0 && current_hp>0);
out:
return 0;
答案 3 :(得分:0)
(1)如果你想退出do-while循环,你可以添加一个布尔变量,所以当它输入最后一个选项时,它将是假的,如下所示:
bool quit = false;
(...)
case 4 :
quit = true;
printf("Good bye!\n\n");
break;
并在do-while的条件下添加值:
while (days_remaining>0 && current_hp>0 && !quit);
因此,它将退出do-while循环并继续代码。
(2)如果你想完成程序,添加一个返回0并忘记布尔值,如下所示:
case 4 :
printf("Good bye!\n\n");
return 0;
请记住:如果您是在基于C的代码上执行此操作,则它不会支持保留字,例如true
和false
。您必须使用0表示false,其他数字表示true,最好是1。