终端没有给出正确的答案。
终端没有给出正确的答案。
提问于 2022-02-26 13:05:55
区块报价
我想做一个计算器来计算科目的一般要点。对于exm，每一个正确的数学问题都给出8分，所以25个问题和5个错误的答案将给出25-5=20*8=160。然后继续计算其他科目(历史，地理.)在结束时告诉我最后的要点。在终点站，它问了我一个错误的问题，然后并没有显示出一般的观点。我该怎么办？
void main() {
String? Subject;
int General;
String? Math;
String? History;
String? Geography;
String? Spanish;
String? English;
int AllQuestions;
int Wrong;
print("Let's calculate your points");
print("Choose the subject");
Subject = stdin.readLineSync();
print("Enter the number of questions");
AllQuestions = int.parse(stdin.readLineSync()!);
print("Enter the number of wrong questions");
Wrong = int.parse(stdin.readLineSync()!);
if (Subject == Math) {
General = (AllQuestions - Wrong)*8;
print(General);
}
if (Subject == History) {
General = (AllQuestions - Wrong)*4;
print(General);
}
if (Subject == Geography) {
General = (AllQuestions - Wrong)*8;
print(General);
}
if (Subject == Snapish) {
General = (AllQuestions - Wrong)*4;
print(General);
}
if (Subject == English) {
General = (AllQuestions - Wrong)*4;
print(General);
}回答 2
Stack Overflow用户
回答已采纳
发布于 2022-02-26 20:20:12
因为您不使用String的值来初始化变量。示例：
String? Math;应：
String? Math = "Math";Stack Overflow用户
发布于 2022-02-26 21:14:36
我相信你想要这样的东西：
void main() {
String? Subject;
int General;
int AllQuestions;
int Wrong;
print("Let's calculate your points");
print("Choose the subject");
Subject = stdin.readLineSync();
print("Enter the number of questions");
AllQuestions = int.parse(stdin.readLineSync()!);
print("Enter the number of wrong questions");
Wrong = int.parse(stdin.readLineSync()!);
if (Subject == "Math") {
General = (AllQuestions - Wrong)*8;
print(General);
}
if (Subject == "History") {
General = (AllQuestions - Wrong)*4;
print(General);
}
if (Subject == "Geography") {
General = (AllQuestions - Wrong)*8;
print(General);
}
if (Subject == "Spanish") {
General = (AllQuestions - Wrong)*4;
print(General);
}
if (Subject == "English") {
General = (AllQuestions - Wrong)*4;
print(General);
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/71276911
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