在 C++ 中停止代码
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Stop Code in C++
提问by Billjk
How do you stop the code from running in C++? I have the code
你如何阻止代码在 C++ 中运行？我有代码
#include <iostream>
#include <cmath>
using namespace std;
int main() {
int total, sub, subc;
cout << "What number would you like to start with? ";
cin >> total;
cout << "Enter in a number, 1 or 2, to subtract";
cin >> sub;
if (sub == 1) {
total--;
subc++;
cout << "You subtracted one";
}
else {
total = total - 2;
subc++;
}
if (sub <= 0)
cout << "YAY!";
}
and i want to insert a thing that just stops the code and exits right after cout << "YAY!"how do i do that???
我想插入一个可以停止代码并在cout << "YAY!"我怎么做之后立即退出的东西？？？
回答by David Robinson
A return statement will end the mainfunction and therefore the program:
return 语句将结束main函数和程序：
return 0;
ETA: Though as @Mysticial notes, this program will indeed end right after the cout << "YAY!"line.
ETA：尽管正如@Mysticial 所指出的那样，该程序确实会在该cout << "YAY!"行之后立即结束。
ETA: If you are in fact working within a while loop, the best way to leave the loop would be to use a breakstatement:
ETA：如果您实际上在 while 循环中工作，离开循环的最佳方法是使用break语句：
#include <iostream>
#include <cmath>
using namespace std;
int main() {
int total, sub, subc;
cout << "What number would you like to start with? ";
cin >> total;
while (1) {
cout << "Enter in a number, 1 or 2, to subtract";
cin >> sub;
if (sub == 1) {
total--;
subc++;
cout << "You subtracted one";
}
else {
total = total - 2;
subc++;
}
if (sub <= 0) {
cout << "YAY!";
break;
}
}
}
回答by perreal
try:
尝试：
char c;
cin >> c;
This will wait until you hit enter before exiting.
这将等到您在退出之前按 Enter 键。
or you can do:
或者你可以这样做：
#include <stdlib.h>
system("pause");
回答by Knasterbax
As David Robinson already noted, your example makes no sense, since the program will stop anyway after
正如大卫罗宾逊已经指出的那样，你的例子没有意义，因为程序无论如何都会停止
cout << "YAY!";
cout << "YAY!";
But depending on the scenario, besides breakand return, also exit()might help. See the manpage:
但是根据情况，除了break和return之外，exit()也可能有所帮助。请参阅联机帮助页：
