Why we used . while printing the string.
printf("%*.*s",10,7,str);
This is the actual program. how the printf statement preforms the operation in detailed explanation.
#include<stdio.h>
int main()
{
char *str="c-pointer";
printf("%*.*s",10,7,str);
return 0;
}
printf("%*.*s",10,7,str);
equal to
printf("%10.7s",str);
You tell to printf to print minimum 10 Letter and first 7 characters in str, so
" c-point"
^^^^^^^^^^
The character to fill is space and default justification is right.
And you can change justify to left by
printf("%-10.7s",str);
it will print
"c-point "
and you can not add 0 to %s but you can do this in numeric conversions and you can not use both - and 0 in numeric conversions also because - will override 0.
The .7 is a precision
Read no more the 7 characters from str.
The 10 is a minimum width
Print at least 10 characters, pad if needed.
