C语言基础语法第八章结构体demo8.11结构体二级指针改写选票系统.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct XuanMin
{
	char name[32];
	int tickes;
};


void initXms(struct XuanMin **pxm,int *pt) //这里定义结构体二级指针  二级/多级指针用于保存指针变量的地址
{
	int i;
	//*pt = 0;
	//*pxm = NULL;
	if (*pxm == NULL){
		printf("请输入有几个人参选：\n");
		scanf("%d",pt);
		*pxm = (struct XuanMin*)malloc(*pt * sizeof(struct XuanMin));
	}
	for (i=0;i<*pt;i++){
		(*pxm)->tickes == 0;
		printf("请输入第%d个选民的名字：\n",i+1);
		scanf("%s",(*pxm)->name);  
		(*pxm)++;
	}
	*pxm = *pxm - *pt;
}
//输出选民信息
void printXms(struct XuanMin *p,int len){//定义一个形参的结构体指针承接xm指针

	
	int i;
	for (i=0;i<len;i++){
		printf("名字：%s,票数：%d\n",p ->name,p ->tickes);
		p++;
	}
}
//唱票环节
int doVot(struct XuanMin *p,int len)
{
	int i;
	int j;
	struct XuanMin *pbak = p;//将地址头先保存到pbak
	int mark;
	char inputName[32];
	int feipiao = 0;
	for (i=0;i<len;i++){
		mark = 0;
		printf("请输入你投给谁：\n");
		memset(inputName,'\0',sizeof(inputName));
		scanf("%s",inputName);
		p = pbak;//指向地址头
		for (j = 0;j<len;j++){
			if(strcmp(inputName,p ->name)==0){
				p ->tickes++;
				mark= 1;
			}
			p++;
		}
		if(mark ==0){
			printf("没有此候选人,投票无效！\n");
			feipiao++;
			
		}
		
	}
	return feipiao;
}

struct XuanMin* getMax(struct XuanMin *p, int len){
	struct XuanMin* max;
	int i;
	max = p;
	
	for (i=0;i<len;i++){
		if (max ->tickes < p ->tickes){
			max = p;
		}
		p++;
		
	}
	return max; 
	
}

int main()
{
	struct XuanMin *xm = NULL;//定义一个结构体指针
	struct XuanMin *final;
	
	int total = 0;
	initXms(&xm,&total);
	printXms(xm,total);
	int feipiao = doVot(xm,total);//唱票环节 并返回废票
	
	printXms(xm,total);
	printf("废票是：%d\n",feipiao);
	final = getMax(xm,total);
	printf("%s以%d票当选！！！废票是%d\n",final->name,final->tickes,feipiao);
	return 0;
}