哪个数据类型的长度最大?(int, char, long, float) java 用c++编写一个程序，输出基本数据类型char, short...
java \u53d8\u91cf\u6570\u636e\u7c7b\u578b\u8f6c\u6362\uff1fbyte, short, char, int, long, float, double\u7b80\u5355\u6570\u636e\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362
\u5728Java\u4e2d\u6574\u578b\u3001\u5b9e\u578b\u3001\u5b57\u7b26\u578b\u88ab\u89c6\u4e3a\u7b80\u5355\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u4e9b\u7c7b\u578b\u7531\u4f4e\u7ea7\u5230\u9ad8\u7ea7\u5206\u522b\u4e3a(byte\uff0cshort\uff0cchar)--int--long--float--double
\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362
\u4f4e\u7ea7\u53d8\u91cf\u53ef\u4ee5\u76f4\u63a5\u8f6c\u6362\u4e3a\u9ad8\u7ea7\u53d8\u91cf\uff0c\u7b14\u8005\u79f0\u4e4b\u4e3a\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362,\u4f8b\u5982\uff0c\u4e0b\u9762\u7684\u8bed\u53e5\u53ef\u4ee5\u5728Java\u4e2d\u76f4\u63a5\u901a\u8fc7\uff1a
byte b;
int i=b;
long l=b;
float f=b;
double d=b;
\u5982\u679c\u4f4e\u7ea7\u7c7b\u578b\u4e3achar\u578b\uff0c\u5411\u9ad8\u7ea7\u7c7b\u578b\uff08\u6574\u578b\uff09\u8f6c\u6362\u65f6\uff0c\u4f1a\u8f6c\u6362\u4e3a\u5bf9\u5e94ASCII\u7801\u503c\uff0c\u4f8b\u5982r
char c='c';
int i=c;
System.out.println("output:" i);
\u8f93\u51fa\uff1aoutput:99;
\u5bf9\u4e8ebyte,short,char\u4e09\u79cd\u7c7b\u578b\u800c\u8a00\uff0c\u4ed6\u4eec\u662f\u5e73\u7ea7\u7684\uff0c\u56e0\u6b64\u4e0d\u80fd\u76f8\u4e92\u81ea\u52a8\u8f6c\u6362\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u8ff0\u7684\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u3002
short i=99;char c=(char)i;System.out.println("output:" c);
public class TestBasicTypeConvert {
static void prt(String s) {
System.out.println(s);
}
void f1(long x) { prt("f1(long)"); }
void f1(float x) { prt("f1(float)"); }
void f1(double x) { prt("f1(double)"); }
public static void main(String [] args){
TestBasicTypeConvert tbConvert=new TestBasicTypeConvert();
tbConvert.f1(1);
}
}
//f1(long)
\u9ad8\u8f6c\u4f4e\u5219\u8981\u5f3a\u8f6c
#include
using namespace std;
int main()
{
cout<<sizeof(int)<<" "<<sizeof(short)<<" "<<sizeof(char)<<" "<<sizeof(long)<<" "<<sizeof(float)
<<<<sizeof(double)<<"endl;
return 0;
}\u662f\u8fd9\u4e2a\u610f\u601d\u5417
float(浮点型) 32
char(字符型) 16
int(整型) 32
所以long的长度最大...........
java中
long(长整型) 64byte
float(浮点型) 32 byte
char(字符型) 16 byte
int(整型) 32byte
long的长度最大
是long
long
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