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You can't specify a variable field with a fixed format string, but you can get around this by making the format string variable:
int width; char format[20]; /* or whatever size is appropriate */ int value; ... sprintf(format, "%%%dd", width); /* generates a string like "%5d" */ scanf(format, &value);The only drawback to this method, other than requiring two statements, is that the compiler can't do a sanity check on the arguments to scanf like it can when the format is a string constant.
AnswerIf you want to specify a variable width in a printf format string (as opposed to scanf), you can do the following:
printf("%*d", width, num);
That will use the value of "width" as the width for formatting the value of "num" as a decimal integer.
Wiki User
∙ 14y ago
Wiki User
∙ 7y agoYes, you can specify variable width, however you can't specify precision. The format tags are as follows:
scanf: %[*][width][length]type
printf: %[*][width][.precision][length]type
As you can see, scanf lacks the precision tag but does include the length tag.
See: http://msdn2.microsoft.com/en-us/library/kwwtf9ch.aspx
Wiki User
∙ 16y agoftghdd ftghdd ftghdd ftghdd
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we have to construct a table of two field structures,where the first field is the funtion name as a string and the second field is just the function name.then search the table to get a string match in the first field and use the second field to call the function.
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How can you call a function given its name as a string?
we have to construct a table of two field structures,where the first field is the funtion name as a string and the second field is just the function name.then search the table to get a string match in the first field and use the second field to call the function.
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What characteristics could a database field have, such as data type, field name, field size and field format?
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