用vs2013编程的，程序如下
#include<stdio.h>
#include <string.h>


#define INPUTPATH "/Users/damotou/Desktop/1.txt"  //这里填写输入文本的路径
#define OUTPUTPATH "/Users/damotou/Desktop/2.txt" //这里填写输出文件的路径
#define FILE_NAME_MAX_SIZE 512
#define BUFFER_SIZE 1024

int main(int argc, char **argv) {
    char** pbuffer = NULL;
    char inputfile_name[FILE_NAME_MAX_SIZE + 1];
    char outputfine_name[FILE_NAME_MAX_SIZE + 1];
    int numberline = 0;
    int randomnum = 0;
    int randvalue[50];
    srand((unsigned int)(time(NULL))); //利用时间产生不同的随机数种子

    bzero(inputfile_name, FILE_NAME_MAX_SIZE + 1);
    bzero(outputfine_name, FILE_NAME_MAX_SIZE + 1);

    strncpy(inputfile_name, INPUTPATH,
            strlen(INPUTPATH) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(INPUTPATH));

    strncpy(outputfine_name, OUTPUTPATH,
            strlen(OUTPUTPATH) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(OUTPUTPATH));

    FILE * infp = fopen(inputfile_name, "r");
    FILE * outfp = fopen(outputfine_name, "w+");

    if (NULL == infp) {
        printf("File:\t%s Not Found\n", inputfile_name);
    }
    if (NULL == outfp) {
        printf("File:\t%s Not Found\n", outputfine_name);
    }

    pbuffer = (char**) calloc(BUFFER_SIZE, sizeof(char*));

    while (!feof(infp)) {
        pbuffer[numberline] = (char *) malloc(BUFFER_SIZE * sizeof(char));
        fgets(pbuffer[numberline], BUFFER_SIZE, infp); //读取一行
        numberline++;
    }

    for (randomnum = 0; randomnum < 50; randomnum++) {
        int temprand = 0;
        lab: randvalue[randomnum] = rand() % 100;
        for (temprand = 0; temprand < randomnum; temprand++) {
            if (randvalue[randomnum] == randvalue[temprand])
                goto lab;
        }
    }

    for (randomnum = 0; randomnum < 50; randomnum++) {
        fwrite(pbuffer[randvalue[randomnum]], sizeof(char), BUFFER_SIZE, outfp);
    }

    for (randomnum = 0; randomnum < 25; randomnum++) {
        int temprand = 0;
        lab_1: randvalue[randomnum] = rand() % (201 - 100) + 100;
        for (temprand = 0; temprand < randomnum; temprand++) {
            if (randvalue[randomnum] == randvalue[temprand])
                goto lab_1;
        }
    }

    for (randomnum = 0; randomnum < 25; randomnum++) {
        fwrite(pbuffer[randvalue[randomnum]], sizeof(char), BUFFER_SIZE, outfp);
    }

    for (randomnum = 0; randomnum < 25; randomnum++) {
        int temprand = 0;
        lab_2: randvalue[randomnum] = rand() % (301 - 200) + 200;
        for (temprand = 0; temprand < randomnum; temprand++) {
            if (randvalue[randomnum] == randvalue[temprand])
                goto lab_2;
        }
    }

    for (randomnum = 0; randomnum < 25; randomnum++) {
        fwrite(pbuffer[randvalue[randomnum]], sizeof(char), BUFFER_SIZE, outfp);
    }

    for (randomnum = 0; randomnum < numberline; randomnum++) {
        free(pbuffer[randomnum]);
    }
    free(pbuffer);

    fclose(infp);
    fclose(outfp);
}
错误命令如下
错误    12    error LNK2019: 无法解析的外部符号 __bzero，该符号在函数 _main 中被引用    d:\documents\visual studio 2013\Projects\ConsoleApplication2\ConsoleApplication2\源.obj    ConsoleApplication2
错误    13    error LNK1120: 1 个无法解析的外部命令    d:\documents\visual studio 2013\Projects\ConsoleApplication2\Debug\ConsoleApplication2.exe    1    1    ConsoleApplication2
请问怎么修改呢？

百度的结果：
bzero无返回值，并且使用string.h头文件，string.h曾经是posix标准的一部分，但是在POSIX.1-2001标准里面，这些函数被标记为了遗留函数而不推荐使用。在POSIX.1-2008标准里已经没有这些函数了。推荐使用memset替代bzero。