user-0 提问: 多重背包问题，输入正常数据，出现逻辑错误，求解答 

回复:
user: user-0
content: 上面的程序有点乱，这个是有问题的程序，麻烦大神帮忙解决一下 #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <stdlib.h> int Max(int a, int b); void Zero_One_package(int *Max_value, int weight, int value, int volume); void Complete_package(int *Max_value, int weight, int value, int volume); int Multi_package(); void main() { 	int Max_V = Multi_package(); 	printf("%d", Max_V); 	system("pause"); } int Max(int a, int b) { 	return a >= b ? a : b; } void Zero_One_package(int *Max_value, int weight, int value, int volume) { 	for (int i = volume; i >= weight; i--) 	{ 		Max_value[i] = Max(Max_value[i], Max_value[i - weight] + value); 	} } void Complete_package(int *Max_value, int weight, int value, int volume) { 	for (int i = weight; i <= volume; i++) 	{ 		Max_value[i] = Max(Max_value[i], Max_value[i - weight] + value); 	} } int Multi_package() { 	int num, volume; 	scanf("%d%d", &num, &volume); 	int *weight = (int *)malloc(sizeof(int)*num); 	int *value = (int *)malloc(sizeof(int)*num); 	int *number = (int *)malloc(sizeof(int)*num); 	int *Max_value = (int*)malloc(sizeof(int)*(num + 1)); 	for (int i = 0; i < num; i++) 	{ 		scanf("%d%d%d", &weight[i], &value[i], &number[i]); 	} 	for (int i = 0; i <= volume; i++) 	{ 		Max_value[i] = 0; 	} 	for (int i = 0; i < num; i++) 	{ 		if (number[i] * weight[i] >= volume) 		{ 			Complete_package(Max_value, weight[i], value[i], volume); 		} 		else 		{ 			int ncount = number[i]; 			int k = 1; 			while (ncount > k) 			{ 				Zero_One_package(Max_value, k*weight[i], k*value[i], volume); 				ncount -= k; 				k *= 2; 			} 			Zero_One_package(Max_value, ncount*weight[i], ncount*value[i], volume); 		} 	} 	return Max_value[volume]; }

user: user-0
content: 没看懂啊，按照你说的试了下，结果没啥变化啊，这应该是一个检查错误的程序吧，我是个新手

user: user-1
content: 有时不将“调用函数名字＋各参数值，进入函数后各参数值，中间变量值，退出函数前准备返回的值，返回函数到调用处后函数名字＋各参数值＋返回值”这些信息写日志到文件中是无论如何也发现不了问题在哪里的，包括捕获各种异常、写日志到屏幕、单步或设断点或生成core文件、……这些方法都不行！ 写日志到文件参考下面： #include <stdio.h> #include <stdlib.h> #include <string.h> #ifdef _MSC_VER     #pragma warning(disable:4996)     #include <windows.h>     #include <io.h> #else     #include <unistd.h>     #include <sys/time.h>     #include <pthread.h>     #define  CRITICAL_SECTION   pthread_mutex_t     #define  _vsnprintf         vsnprintf #endif //Log{ #define MAXLOGSIZE 20000000 #define MAXLINSIZE 16000 #include <time.h> #include <sys/timeb.h> #include <stdarg.h> char logfilename1[]="MyLog1.log"; char logfilename2[]="MyLog2.log"; static char logstr[MAXLINSIZE+1]; char datestr[16]; char timestr[16]; char mss[4]; CRITICAL_SECTION cs_log; FILE *flog; #ifdef _MSC_VER void Lock(CRITICAL_SECTION *l) {     EnterCriticalSection(l); } void Unlock(CRITICAL_SECTION *l) {     LeaveCriticalSection(l); } #else void Lock(CRITICAL_SECTION *l) {     pthread_mutex_lock(l); } void Unlock(CRITICAL_SECTION *l) {     pthread_mutex_unlock(l); } #endif void LogV(const char *pszFmt,va_list argp) {     struct tm *now;     struct timeb tb;      if (NULL==pszFmt||0==pszFmt[0]) return;     _vsnprintf(logstr,MAXLINSIZE,pszFmt,argp);     ftime(&tb);     now=localtime(&tb.time);     sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);     sprintf(timestr,"%02d:%02d:%02d",now->tm_hour     ,now->tm_min  ,now->tm_sec );     sprintf(mss,"%03d",tb.millitm);     printf("%s %s.%s %s",datestr,timestr,mss,logstr);     flog=fopen(logfilename1,"a");     if (NULL!=flog) {         fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);         if (ftell(flog)>MAXLOGSIZE) {             fclose(flog);             if (rename(logfilename1,logfilename2)) {                 remove(logfilename2);                 rename(logfilename1,logfilename2);             }         } else {             fclose(flog);         }     } } void Log(const char *pszFmt,...) {     va_list argp;      Lock(&cs_log);     va_start(argp,pszFmt);     LogV(pszFmt,argp);     va_end(argp);     Unlock(&cs_log); } //Log} int main(int argc,char * argv[]) {     int i; #ifdef _MSC_VER     InitializeCriticalSection(&cs_log); #else     pthread_mutex_init(&cs_log,NULL); #endif     for (i=0;i<10000;i++) {         Log("This is a Log %04d from FILE:%s LINE:%d\n",i, __FILE__, __LINE__);     } #ifdef _MSC_VER     DeleteCriticalSection(&cs_log); #else     pthread_mutex_destroy(&cs_log); #endif     return 0; } //1-79行添加到你带main的.c或.cpp的那个文件的最前面 //81-86行添加到你的main函数开头 //90-94行添加到你的main函数结束前 //在要写LOG的地方仿照第88行的写法写LOG到文件MyLog1.log中