能不能用两个float？为什么非要加用一个double

#include <stdio.h>
int main()
{
    char c = 'a';
    int n =         //将c赋值给n
    float f =       //将c赋值给f
    double d =      //将c赋值给d
    printf("%d\n",n);
    printf("%f\n",f);
    printf("%lf\n",d);
    return 0;
}

宝慕林5373703

2018-10-23

源自：C语言入门 2-7

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慕粉5534796
2018-10-23

#include <stdio.h>
int main()
{
    char c = 'a';
    int n =        c; //将c赋值给n
    float f =    c; //将c赋值给f
    double d =    c; //将c赋值给d
    printf("%d\n",n);
    printf("%f\n",f);
    printf("%lf\n",d);
    return 0;
}