编写函数int count_number_string(char str[])和函数int maxnum_string(char str[])

题目如图：

这里不再赘述

代码：

//字符串中统计与查询
//杨鑫
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAXN 1000
char Str[MAXN];
/*
 *寻找字符串中最大的整数
 * */
int maxnum_string(char str[])
{
	int i = 0, n = 0, maxNum = 0;
	while(str[i] != '\0')
	{
		if(str[i] >= '0' && str[i] <= '9')
				n = n * 10 + str[i] - '0';
		else
		{
			if(maxNum < n)
					maxNum = n;
			n = 0;
		}
		i++;
	}
	if(maxNum < n)
			maxNum = n;
	return maxNum;
}

/*
 *功能：统计字符串中的数字
 * */
int count_number_string(char str[])
{
	int i = 0, count = 0;
	while(str[i] != '\0')
	{
		if(str[i] >= '0' && str[i] <= '9')
		{
			if(str[i+1] < '0' || str[i+1] > '9')
			{
					count++;
			}

		}
		i++;
	}
	return count;

}

int main()
{
	int i = 0, count_main = 0, max = 0;
	printf("请输入一个字符串: ");
	gets(Str);
	printf("字符串的内容: ");
	puts(Str);
	count_main = count_number_string(Str);
	printf("字符串一共同拥有:%d个数字,", count_main);
	max = maxnum_string(Str);
	printf("最大数字为:%d\n", max);
	return 0;
}

结果：

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