单选题 下面的程序运行后输出为( )。
#include ＜stdio.h＞
# include ＜math.h＞
main()
int a,b;
float c;
b = 5;c = 6;c = b+7;b = c+1;
a = sqrt((double)b+c);
printf("%d,%f,%d",a+6,C,b);