if(a < 0.7) here
a is a float variable and
0.7 is a double constant. The float variable
a is less than double constant
0.7. Hence the
if condition is satisfied and it prints
'C'
Example:
#include<stdio.h>
int main()
{
float a=0.7;
printf("%.10f %.10f\n",0.7, a);
return 0;
}
Output:
0.7000000000 0.6999999881