[英]unsigned char hex to int dec conversion C++
How to convert variable unsigned char with HEX value to variable int with DEC value. 如何将带有HEX值的变量unsigned char转换为带有DEC值的变量int。 I have got:
我有:
unsigned char length_hex = 0x30; // HEX
How to convert to int DEC? 如何转换为int DEC?
int length_dec = length_hex; // With result length_dec = 48
As some people have commented the conversion is automatic. 有些人评论说转换是自动的。 Try:
尝试:
int main (void)
{
unsigned char length_hex = 0x30;
printf("0x30 is char:%c and int:%d.",length_hex,length_hex);
return 0;
}
and see what you get - when you convert it to a char it's '0' (the character 0) and as an int it's 48. Also, it doesn't really matter if I save the constant 0x30 as an int or char. 并看看你得到了什么 - 当你将它转换为char时它是'0'(字符0)并且作为一个int它是48.而且,如果我将常量0x30保存为int或char并不重要。 Just look at:
看看:
printf("0x30 is char:%c and int:%d.",0x30,0x30);
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