/*问题描述*/
/*
*五只猴子一起摘了一堆桃子,因为太累,决定先睡一觉再分。 *过了不知多久,来了一只猴子,它见别的猴子没来,便将一堆桃子平均分成 5 份,结果*多了一个,就将多的这个吃了,拿走其中的一堆。 *又过了不知多久,第二只猴子来了,它不知道有一个同伴已经来过,还以为自己是第一*个,便将地上的桃子平均分成 5 份,发现也多了一个,同样吃了这一个,拿走其中的一*堆。第3只,第4只,第5 只猴子都是这样...... *问这5只猴子至少摘了多少个桃子?
*/
/*
程序说明:
(1)修改宏 MAXNUM 的大小,重新编译后即可搜索出所有0~MAXNUM 之间满足条件的数字。
(2)这是一种比较直接的算法,有许多地方值得改进。欢迎大家一起探讨
(3)本程序用vc++6.0在win2000环境中编译通过。
*/
/*zhaitao.c*/
#include "stdio.h" #include "stdlib.h" #include "math.h" #include "string.h"
#define bool int #define true 1 #define false 0
#define MAXNUM 5000
/*target number strUCt*/ typedef struct tagTARGETNUM { int totalN; int remains; } _TargetNum, *p_TargetNum;
typedef struct tagTAGTEST { _TargetNum targetNum[MAXNUM]; int count; /*num satisfied our condition*/ }_tagTest, p_tagTest;
bool monkey(int iOriginal, int * pRemains); bool SepPeach(int iTotal, int *remains); void FindSmallest(_tagTest* tgtst);
void main(void) { int i = 0; int tempRmn = 0; bool ret = false; _tagTest tgtst; memset(&tgtst,0,sizeof(_tagTest)); printf("test-- from:%d , to:%d
press any key to continue
",i,MAXNUM); getchar(); printf("starting find...
");
for(; i < MAXNUM; i++) { if( (ret = SepPeach(i,&tempRmn)) != true) else { tgtst.targetNum[tgtst.count].totalN = i; tgtst.targetNum[tgtst.count++].remains = tempRmn; } }
FindSmallest(&tgtst); getchar(); }
/************************************************************************/ /* if the original number satified our condition, the function will return true, else return false. */ /************************************************************************/ bool monkey(int iOriginal, int * pRemains) { // int remains = 0; iOriginal -= 1; //remain 1 if (iOriginal % 5 != 0) { return false; } *pRemains = iOriginal - iOriginal/5; return true; }
bool SepPeach(int iTotal, int* remains) { int flag = false; int tempNum = 0; //temporary number of remained peaches int i = 0; tempNum = iTotal; for(i = 0; i < 5; i++) { if((flag = monkey(tempNum, &tempNum)) == false) { printf("total num of peaches %d does not satisfy our condition!
",iTotal); return false; } } *remains = tempNum; printf("total num of peaches: %d, remains: %d
", iTotal, *remains);
return true; }
void FindSmallest(_tagTest* tgtst) { int i; //int temp = -1; _TargetNum tempTn; tempTn.totalN = 1000000; printf("we found %d nums which satisfied our condition
",tgtst->count); if (tgtst->count == 0) else { printf("----these nums are:
"); } for(i = 0; i < tgtst->count; i++) { printf("total:%d remains:%d
",tgtst->targetNum[i].totalN,tgtst->targetNum[i].remains); if(tempTn.totalN >= tgtst->targetNum[i].totalN) { tempTn.totalN = tgtst->targetNum[i].totalN; tempTn.remains = tgtst->targetNum[i].remains; }
} printf("
----------------------------------------
"); printf("the smallest total num of peaches is: %d, the remains is: %d
",tempTn.totalN,tempTn.remains); return; }
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