函数（传指针和传引用）与指针的运用

函数（传指针和传引用）与指针的运用

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
using namespace std;

char *str_reverese(char *str,int len)
{
    char *start = str;
    char *end = str + len -1;
    char ch;
    if(str!=NULL){
        while(start < end){
            ch = *start;
            *start++ = *end;
            *end-- = ch;
        }
    }
    return str;
}
//传引用
void NumCount(char ch,int &n,int &sum)
{
    if(ch >= '0' && ch <= '9'){
        sum += (ch - '0') * n;
        n = n*10;
    }
    else n = 1;
}

int main()
{
    char str[1105];
    while(gets(str))
    {
        int sum = 0;
        int n = 1;
        str_reverese(str,strlen(str));
        for(int i=0;i<strlen(str);i++){
            NumCount(str[i],n,sum);
        }
        cout << sum << endl;
    }
}