编程珠玑第1章的算法实现

断断续续看了几天，在实现几个算法后，总算把这个代码写出来了，测试耗时在10s 算法真强大:)

#include <stdio.h>#include <stdlib.h>#include <stdarg.h>#include <string.h>#include <time.h>#define START 1000000#define END 9999999int main(){    FILE *fp = fopen("./input.txt", "w");    if (fp == NULL) {        printf("Can't open file input.txt");        exit(-1);    }    int i=0, j=0;    srand((int)time(0));    while(1) {        j = (unsigned int)(rand() %(END-START));        if (j < START || j > END) continue;        fprintf(fp, "%d\n", j);        i++;        if (i == (END-START)) break;    }    fclose(fp);}