C printf field width
Description
Field-width sets the least number of columns for output.
Example
add field width for int type output
#include <stdio.h>
/* ww w . ja va 2 s .c o m*/
main()
{
int i = 9;
printf(">%4d<",i);
}
The code above generates the following result.
Example 2
If the value is more than the specified column, field-width is ignored.
#include <stdio.h>
main()//from w w w.j av a 2 s. c o m
{
int i = 999999;
printf(">%4d<",i);
}
The code above generates the following result.
Example 3
Flag characters are used to give directives for the output.
You can use multiple flag characters in any order.
- Indicates that output is left justified.
#include <stdio.h>
//from w w w . j av a 2 s . com
main()
{
printf("%-10.4d\n", 25);
printf("%10.4d\n", 25);
}
Example 4
Right justifying and left justifying values
#include <stdio.h>
// w ww .j av a2s.c om
int main()
{
printf( "%10s%10d%10c%10f\n\n", "hello", 7, 'a', 1.23 );
printf( "%-10s%-10d%-10c%-10f\n", "hello", 7, 'a', 1.23 );
return 0;
}
The code above generates the following result.
Example 5
control field width for float point value
#include <stdio.h>
/* www . j a v a 2s. c o m*/
int main(void)
{
double item;
item = 10.12304;
printf("%f\n", item);
printf("%10f\n", item);
printf("%012f\n", item);
return 0;
}