objective-c - 计算问题

Question

谁能看看我处理下面计算的方式是否有问题？即使答案实际上是正确的，我似乎在运行时得到“你得了 0 分”。

- (void)countGain{
int gain = 0;
int percentage;
if ([answer objectForKey:@"1"] == [usrAnswer objectForKey:@"1"]) {
    gain += 1;

}
percentage = (gain / 10) * 100;

NSString *scored = [[NSString alloc] initWithFormat:@"You scored %d",percentage];
score.text = scored;
rangenans.text = [answer objectForKey:@"1"];

[scored release];

}

Answer 1

有什么意义:

percentage = (gain / 10) * 100;

使用

percentage = gain * 10;

休息看起来很好。你不应该除以整数。如果你得到 3/10 并且这是 int 值怎么办？

状态变化

if([answer objectForKey:@"1"] == [usrAnswer objectForKey:@"1"])

收件人:

if([[answer objectForKey:@"1"] isEqualToString:[usrAnswer objectForKey:@"1"]])