c语言程序设计现代方法22.6习题

#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>

#define POINT ‘.’

void print_head(void);

main(int argc, char* argv[])
{
int ch, i = 0;
char str[11];
FILE *fp;

if (argc != 2){
	printf("Usage: Enter program filename.\n");
	exit(EXIT_FAILURE);
}

if ((fp = fopen(argv[1], "rb")) == NULL){
	printf("%s can't open.\n", argv[1]);
	exit(EXIT_FAILURE);
}

print_head();

while ((ch = getc(fp)) != EOF){
	if (i % 10 == 0){
		if (i != 0)
			printf("%15s\n", str);
		printf("%6d%4c", i, ' ');
	}
	if (isprint(ch))
		str[i % 10] = ch;
	else
		str[i % 10] = POINT;
	str[i % 10 + 1 ] = '\0';
	printf(" %02X", ch);
	i++;
}
if (i % 10 != 0){
	for (int j = 0; j < 10 - i % 10; j++)
		printf("   ");
}
printf("%5c%-s\n", ' ', str);

return 0;

}

void print_head(void){
printf(“Offset%5c”, ’ ');
printf("%12cBytes%17c", ’ ', ’ ');
printf(“Characters\n”);
printf("------%5c", ’ ');
for (int i = 0; i < 29; i++){
printf("-");
}
printf("%5c----------\n", ’ ');
}