#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>
#include <string.h>
#include <malloc.h>
#include <memory.h>

char path[1024] = "C:\\Users\\Administrator\\Desktop\\X.PNG";
char **ppf = NULL;
int open_source_file()//打开源文件
{
    FILE *pf = fopen(path, "rb");
    if (pf == NULL)
    {
        puts("文件打开失败\n");
        return -1;
    }
    else
    {
        fseek(pf, 0, SEEK_END);
        int size = ftell(pf);
        fclose(pf);
        return size;
    }
   
}


void subsectionjia(int sum)//分段加密
{
    FILE *pfr = NULL;
    FILE *pfw = NULL;

    if ((pfr = fopen(path, "rb")) == NULL)
    {
        printf("文件打开失败\n");
        return;
    }
    long long length = open_source_file();//获取源文件总字

    if(length%sum == 0)
    {
        for (int i = 0; i < sum; i++)
        {
            pfw = fopen(ppf[i], "wb");
            for (int j = 0; j < length / sum; j++)
            {
                fputc(fgetc(pfr), pfw);
            }
            fclose(pfw);
        }

    }
    else
    {
        for (int i = 0; i < sum - 1; i++)
        {
            pfw = fopen(ppf[i], "wb");
            for (int j = 0; j < length / (sum - 1); j++)
            {
                fputc(fgetc(pfr), pfw);
            }
            fclose(pfw);
        }
        {
            pfw = fopen(ppf[sum - 1], "wb");
            for (int i = 0; i < length%sum; i++)
            {
                fputc(fgetc(pfr), pfw);
            }
            fclose(pfw);
        }

    }
    fclose(pfr);
}


void subsectionjie(int sum)
{
    FILE *pnew = fopen("C:\\Users\\Administrator\\Desktop\\TT.PNG", "wb");
    for (int i = 0; i <sum; i++)
    {
        FILE *p = fopen(ppf[i], "rb");
        while (!feof(p))
        {
            fputc(fgetc(p), pnew);
        }
        fclose(p);
    }
    fclose(pnew);
}


void main()
{
    int sum = 0;
    scanf("%d", &sum);
    ppf = malloc(sizeof(char *)*sum);
    for (int i = 0; i < sum; i++)
    {
        ppf[i] = malloc(sizeof(char) * 1024);
        memset(ppf[i], '\0', 1024);
        sprintf(ppf[i], "C:\\Users\\Administrator\\Desktop\\X %d.PNG",i);
    }
   
    subsectionjia(sum);
    subsectionjie(sum);

    system("pause");
}

不知道 错误在哪！
分割4个 结果是这样的：
合并的结果  ：
原始图片：

没人帮忙看看啊？

求大神指点 哪里错了？

  本人刚学的C啊  真不知道哪里错了啊  是写法上还是逻辑上 还是说都有错误？ 哪个地方写错了啊？

可以了  谢谢  能问下  是什么原因造成的吗？ 新手 不是非常明白

原来如此  谢谢！