Language in C 面试题与答案
Question: How do I write printf( ) so that the width of a field can be specified at runtime?
Answer: This is shown in following code snippet.main( ) { int w, no ; printf ( "Enter number and the width for the number field:" ) ; scanf ( "%d%d", &no, &w ) ; printf ( "%*d", w, no ) ; } Here, an '*' in the format specifier in printf( ) indicates that an int value from the argument list should be used for the field width. |
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