C++ 从“const char*”到“char*”的无效转换[-fpermissive]
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invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive]
提问by freinn
int :: cadena calculatelenght(const cadena& a, const char* cad)
{
cadena c;
int lenght = 0;
char* punt; punt = cad;
while(*punt){
lenght++; punt++;
}
return lenght;
}
I have this problem, I want to calculate the length of a C string without using functions like strlen
, in other methods of my cadena class I can because is not const char*, but now I don't know what to do.
我有这个问题,我想在不使用类似函数的情况下计算 C 字符串的长度strlen
,在我的 cadena 类的其他方法中我可以,因为不是 const char*,但现在我不知道该怎么做。
回答by Kerrek SB
You can declare punt
to be of the correct type:
您可以声明punt
为正确的类型:
const char * punt = cad;
回答by Joni
You need:
你需要:
const char* punt; punt = cad;