HDU 4054 - Hexadecimal View

/*
ID:esxgx1
LANG:C++
PROG:hdu4054
*/
#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;

int main(void)
{
    #ifndef ONLINE_JUDGE
    freopen("in.txt", "r", stdin);
    #endif

    char ascs[4097];

    while(cin.getline(ascs, 4097)) {
        int len = strlen(ascs);
        for(int i=0; i<len; i+=16) {
            printf("%04x: ", i);
            int t = 0;
            while(t<min(len-i, 16)) {
                printf("%02x", ascs[t++ +i]);
                if (!(t % 2)) putchar(‘ ‘);
            }
            while(t < 16) {
                printf("  "), ++t;
                if (!(t % 2)) putchar(‘ ‘);
            }
            t = 0;
            while(t<min(len-i, 16)) {
                if (ascs[t + i] >= ‘A‘ && ascs[t + i] <= ‘Z‘)
                    putchar(ascs[t + i] - ‘A‘ + ‘a‘);
                else if (ascs[t + i] >= ‘a‘ && ascs[t + i] <= ‘z‘)
                    putchar(ascs[t + i] - ‘a‘ + ‘A‘);
                else putchar(ascs[t + i]);
                ++t;
            }
            putchar(‘\n‘);
        }
    }
    return 0;
}