16位乘16位问题

下面追加的问题我没看明白，上面的问题，请这样写：

  sum_A = 1326L * 1326L;

L的作用说明如下：

When you initialize a long double to a constant, you must use the l or L suffix. The constant is treated as a

double type without the suffix and the run-time support double-to-long conversion routine is called for the

initialization. This could result in the loss of precision. For example:

long double a = 12.34L; /* correctly initializes to double precision */

long double b = 56.78; /* converts single precision value to double precision */

The formatting rules for long doubles in C I/O require a capital ’L’ in the format string. For example:

printf("%Lg", 1.23L);

printf("%Le", 3.45L);

详情请看一下TMS320C28x Optimizing C C++ Compiler中的说明。