42 c++ crosses initialization jump to case label

c++ - How do I resolve this error: jump to case label crosses ... May 12, 2014 · A "case" of a switch doesn't create a scope, so, as the error says, you're jumping over the initialization of "sum" if the choice isn't 1. You either need to declare sum and diff outside the switch, or create blocks with { } for each of the cases. Share Improve this answer Follow answered May 12, 2014 at 1:21 Andrew McGuinness 2,042 12 18 C++ – How to resolve this error: jump to case label crosses ... C++ – How to resolve this error: jump to case label crosses initialization. c++ variables. This question already has answers here: Error: Jump to case label in ...

c++ error:crosses initialization of errror:jump to case label ... Jan 10, 2023 · c++ error:crosses initialization of errror:jump to case label [-fpermissive] switch语句中没有单独的区域块限制变量的生命周期，因此变量生命周期是从声明到switch结束。. 因此在case1中声明的变量在case2中也可以使用。. 如果在case1中声明并且对其进行初始化。. 而运行时直接跳入 ...

C++ crosses initialization jump to case label

Error - crosses initialization? - C++ Forum - cplusplus.com Nov 18, 2012 · In C/C++, switch statements allows fall-through semantics with the case labels. You declared a FindWord variable when your switch statement encounters case 'F' or 'f'. To solve this, make FindWord in its own scope or declare it outside the switch statements. 1 2 3 4 5 6 7 8 c++ - Crosses initialization of string and jump to label case ... Jan 7, 2020 · case labels are really a lot like dreaded goto labels; they do not constitute a new scope. Consequently, a switch selecting the correct case label to jump to is, for better or worse, a lot like goto statement jumping to a label. The jump is not allowed to cross the initialisation of your various objects - exactly as the error messages say. 【C++ 异常】error: jump to case label [-fpermissive] - 简书 Sep 26, 2017 · 这里由于我们无法确定其他case中是否会使用到这种变量，使用之前变量是否被初始化，所以编译器会报错。 例如：test值为2，直接执行case 2的话，未定义变量就会出异常。 这也是编译器报错 crosses initialization 的原因。 经过检验发现， 无论其他分支是否包含定义的变量，只要case中带变量不带括号，编译器都会报错 。

C++ crosses initialization jump to case label. 【C++ 异常】error: jump to case label [-fpermissive] - 简书 Sep 26, 2017 · 这里由于我们无法确定其他case中是否会使用到这种变量，使用之前变量是否被初始化，所以编译器会报错。 例如：test值为2，直接执行case 2的话，未定义变量就会出异常。 这也是编译器报错 crosses initialization 的原因。 经过检验发现， 无论其他分支是否包含定义的变量，只要case中带变量不带括号，编译器都会报错 。 c++ - Crosses initialization of string and jump to label case ... Jan 7, 2020 · case labels are really a lot like dreaded goto labels; they do not constitute a new scope. Consequently, a switch selecting the correct case label to jump to is, for better or worse, a lot like goto statement jumping to a label. The jump is not allowed to cross the initialisation of your various objects - exactly as the error messages say. Error - crosses initialization? - C++ Forum - cplusplus.com Nov 18, 2012 · In C/C++, switch statements allows fall-through semantics with the case labels. You declared a FindWord variable when your switch statement encounters case 'F' or 'f'. To solve this, make FindWord in its own scope or declare it outside the switch statements. 1 2 3 4 5 6 7 8

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