如何在C中的开关盒中返回使用盒的菜单 [英] How to go back to menu using case in switch case in C

问题描述

在不使用GOTO命令的情况下，如何在切换情况下使用情况返回菜单.这是示例:

How to go back to menu using case in switch case without using GOTO command. So this is the sample:

while(1){
  printf("1: Basic Math\n2. Intermediate Math\n3. Advance Math");
  printf("Enter your choice: ");
  int choice;
  scanf("%d", &choice);

  switch(choice)
    int theChoices;
    case 1:
      printf("1. Add\n 2. Subtract\n3. Go back to menu");
      scanf("%d", &theChoices);

      switch (theChoices) {
         case 1:
           //calculation ...
         case 2:
           //calculation ...
         case 3:
           // Go Back to menu which is Basic math, Intermediate Math, Advance math
           // ***** I want to know how do i get back to the main menu. *****
    case 2:
    // ....
// ....................

所以我的问题又是我如何使用情况3返回菜单.当我尝试使用关键字break时，当我选择情况3时它将自动关闭程序.

So my question again is how do i get back to the menu using the case 3. When i try using the keyword break, it automatically close the program when i chose case 3. Please help.

推荐答案

请改用continue;.它将跳出所有case并继续在它们之后执行代码，这将使程序返回到while (1)之后的第一行.不要忘记用break;关闭每个case.

Use continue; instead. It will jump out of all cases and continue executing code after them, which will make the program return to the first line after while (1). Don't forget to close each case with a break;.

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