萌新求助，这个为什么90？

daonan @ 2021-08-25 17:20:51

#include<stdio.h>
int main ()
{
    float a;
    long long int d;
    scanf("%f",&a);
    d=1*a;
    printf("%lld",d);
    return 0;
}

by wbs200 @ 2021-08-25 17:23:31

@daonan 你拿float类型去乘int类型好像会出问题（不知道对不对）

by _Haoomff_ @ 2021-08-25 17:23:34

@daonan 强转long long

by _Haoomff_ @ 2021-08-25 17:24:18

cout<<(long long)a;

by Textbook_blasphemy @ 2021-08-25 17:24:27

@daonan long long

by wbs200 @ 2021-08-25 17:26:25

@L_YALONG cout的是d吧

by daonan @ 2021-08-25 17:32:45

请问c语言改成d=（long long)a;为什么还是不对呢？还是90qwq

#include<stdio.h>
int main ()
{
    float a;
    long long int d;
    scanf("%f",&a);
    d=(long long)a;
    printf("%lld",d);
    return 0;
}

by _Haoomff_ @ 2021-08-25 17:34:17

@daonan 你上面定long long int，下面用long long，你要是能过还真是奇葩

by Liuyuzhuo @ 2021-08-25 18:28:28

a掉精度了，要开double/long double

by LPX123 @ 2021-12-11 15:05:21

因为虽然题目里说的是单精度（float），但要用双精度（double）系统才算你对