求各位大大解答

#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;   
}