4-6

#include<stdio.h>
#include<string.h>
int main(void)
{
int i;
char name[20],firstname[20];
printf("please input your name:\n");
scanf("%s",name);
printf("please input your firstname:\n");
scanf("%s",firstname);
printf("%s %s\n",name,firstname);
for(i=0;i<strlen(name)-1;i++)
{
printf(" ");
}
printf("%d",strlen(name));
for(i=0;i<strlen(firstname);i++)
{
printf(" ");
}
printf("%d\n",strlen(firstname));
printf("%s %s\n",name,firstname);

printf("%-d",strlen(name));
for(i=0;i<strlen(name);i++)
{
printf(" ");
}
printf("%d\n",strlen(firstname));
return 0;
}