Misconceptions about C conversion specifiers and some knowledge about arrays

In fact,%c in the scanf () function is not used to enter a single character, but instead to enter a set of characters.

For example:

Char a[3];scanf ("%3c", a);

Where "3" specifies the width of the input data and, of course, the width is "1",%c can indeed be used to enter a single character. But think

The format conversion of%c is simply a big mistake to enter a single character, and may produce a very serious potential bug.

The contact%nd,n Specifies the width of the input data, but unlike%NC,%nd only enters a single shaping data, which is not greater than n in width.

Review the knowledge points about the array:

When an array element is assigned a value in initialization, the remaining element system defaults to 0.

If you assign a value to a partial element in the input, the remaining element is not assigned, and the value is a random number.

The definition of an array in a formal parameter, such as Double A (double a[n]), this n is meaningless, because the parameter type Double[n],

The array name type that is invoked as an argument is indeed a double *, meaning that the argument essence here is just a pointer to the data of a double type.

It does not itself contain any information about the size of the array. The correct notation is double A (double [],int).

Misconceptions about C conversion specifiers and some knowledge about arrays