代码共享：缓冲区16进制或者二进制输出到控制台
#include <iostream>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <ctype.h>void printBinStr(const void* buf , size_t size); void printHexStr(const void* buf , size_t size);int main(int argc, char* argv[]){ char arr[100]; for (int i = 0; i != 100 ; ++i) { arr[i] = i + '1'; } printBinStr(arr , sizeof(arr)); putchar('\n');// 打印文件 const char* filename = "main.cpp"; if (argc == 2) filename = argv[1]; FILE *f = fopen(filename, "rb"); if (!f) { std::cerr << "Error: Cannot open File " << std::endl; return -1; } // Get file size: fseek(f, 0, SEEK_END); const long N = ftell(f); fclose(f); f = fopen(filename, "rb"); char* buf = new char[N + 1]; fread(buf, 1, N, f); buf[N] = '\0'; printHexStr(buf , N); return 0;}void printBinStr(const void* buf , size_t size){ unsigned char* str = (unsigned char*)buf; char line[512] = {0}; const size_t lineLength = 6; // 每行6个字符 char text[24] = {0}; char sbin[10] = {0}; char* pc; int textLength = lineLength; for (size_t ix = 0 ; ix < size ; ix += lineLength) { sprintf(line, "%.8xh: ", ix);// 打印二进制 for (size_t jx = 0 ; jx != lineLength ; jx++) { itoa(* (str + ix + jx), sbin, 2); //转换成字符串，进制基数为2 if (ix + jx >= size) { sprintf(line + (11 + jx * 9), " "); // 处理最后一行空白 if (ix + jx == size) textLength = jx; // 处理最后一行文本截断 } else sprintf(line + (11 + jx * 9), "%08s ", sbin); }// 打印字符串 { memcpy(text, str + ix, lineLength); pc = text; while (pc != text + lineLength) { if ((unsigned char)*pc < 0x20) // 空格之前为控制码 *pc = '.'; // 控制码转成'.'显示 pc++; } text[textLength] = '\0'; sprintf(line + (11 + lineLength * 9), "; %s", text); } printf("%s\n", line); }}void printHexStr(const void* buf , size_t size){ unsigned char* str = (unsigned char*)buf; char line[512] = {0}; const size_t lineLength = 16; // 8或者32 char text[24] = {0}; char* pc; int textLength = lineLength; for (size_t ix = 0 ; ix < size ; ix += lineLength) { sprintf(line, "%.8xh: ", ix);// 打印16进制 for (size_t jx = 0 ; jx != lineLength ; jx++) { if (ix + jx >= size) { sprintf(line + (11 + jx * 3), " "); // 处理最后一行空白 if (ix + jx == size) textLength = jx; // 处理最后一行文本截断 } else sprintf(line + (11 + jx * 3), "%.2X ", * (str + ix + jx)); }// 打印字符串 { memcpy(text, str + ix, lineLength); pc = text; while (pc != text + lineLength) { if ((unsigned char)*pc < 0x20) // 空格之前为控制码 *pc = '.'; // 控制码转成'.'显示 pc++; } text[textLength] = '\0'; sprintf(line + (11 + lineLength * 3), "; %s", text); } printf("%s\n", line); }}