File splitting Tool

# Include <iostream> # include <iomanip> # include <fstream> # include <string> using namespace std; int main () {string path; cout <"Enter the path of the file to be separated:"; cin> path; string block; cout <"Enter the file size of each block (1G/1 M/1 K/1B):"; cin> block; const int block_size = 33554432; unsigned _ int64 size; int ubound = block. size ()-1; sscanf (block. substr (0, ubound ). c_str (), "% I64d", & size); switch (block [ubound]) {case 'G': {size <= 30; break ;} case 'M': {size <= 20; Break;} case 'K': {size <= 10; break;} default: {break;} ifstream in (path. c_str (), ios: binary); if (! In) {cout <"failed to open the file. Please run it again! "<Endl; return-1;} int count = 0; double sum = 0; char * buf = new char [block_size]; ofstream out (path + ". bat "). c_str (); out <"@ echo off" <endl; out <"echo ---------------------------------------------------" <endl; out <"echo-welcome to the file splitting tool-" <endl; out <"echo-" <endl; out <"echo--" <endl; out <"echo -----------------------------------------------------" <endl; for (int I = 1; I> 0; I ++, count ++) {itoa (I, buf, 10); st Ring fullname = path + ". part "+ buf; cout <" generating "<fullname <endl; ofstream fout (fullname. c_str (), ios: binary | ios: trunc); unsigned _ int64 current_size = size; while (current_size> 0) {if (current_size> = block_size) {in. read (buf, block_size);} else {in. read (buf, current_size);} if (in. gcount () = 0) {I =-1; break;} current_size-= in. gcount (); sum + = in. gcount (); fout. write (buf, in. gcount ();} fout. close () ;}out <"echo this batch of processed files are divided "<Count <" sub-files, total "; if (sum> = 1000000000) {out <fixed <setprecision (2) <sum/1073741824 <"G";} else if (sum> = 1000000) {out <fixed <setprecision (2) <sum/1048576 <"M";} else if (sum> = 1000) {out <fixed <setprecision (2) <sum/1024 <"K" ;}else {out <sum <"B" ;}out <endl; out <"echo: 1. Check whether the number of sub-files is consistent and placed in the current directory "<endl; out <" echo 2. whether the available space is sufficient "<endl; out <"pause" <endl; out <"echo starts file merging. Do not close the merging process. The merging duration is related to the file size." <endl; Out <"the current window is automatically closed after echo merge ends" <endl; out <"echo wait... "<endl; out <" copy/B "; int pos = path. find_last_of ('\'); string filename = path. substr (pos + 1); for (I = 0; I <count; I ++) {out <filename <". part "<I + 1; if (I <count-1) {out <'+';} out <'' <filename <endl; out. close (); delete [] buf; in. close (); cout <"file split successful! "<Endl; system (" pause "); return 0 ;}