在Swift中，您可以使用// initiate global variable's
int correct = 0, incorrect = 0;
void checkanswer(int var1, int var2, int useranswer)
{
if(useranswer == var1 + var2)
correct++;
else
incorrect++;
}
int main(void)
{
...
printf (" What is 2 + 2\n");
scanf("%d", &A1);
checkanswer(2, 2, A1);
//next question
}
查看哪些函数正在慢慢编译。是否有Objective-C的等价物？