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can we specify variable field width in a scanf() format
string? if possible how in c language?
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Answer Posted / deepedra kushwaha
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.
Read more:
http://wiki.answers.com/Q/Can_you_specify_variable_field_width_in_a_scanf_format_string_If_possible_how#ixzz1bSMgbeUL
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