#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string.h>
#include <map>
//#include <sys/time.h>
using namespace std;
void main() {
//定义map对象,当前没有任何元素
map<char, int> m;
//赋值:字符映射数字
m['0'] = 0;
m['1'] = 1;
m['2'] = 2;
m['3'] = 3;
m['4'] = 4;
m['5'] = 5;
m['6'] = 6;
m['7'] = 7;
m['8'] = 8;
m['9'] = 9;
/**//*上面的10条赋值语句可采用下面这个循环简化代码编写
for(int j = 0 ; j < 10 ; j++)
{
m['0' + j] = j ;
}
*/
string sa, sb;
sa = "6234";
int i;
int sum = 0;
int factor = 1;
for (i = sa.length() - 1; i >= 0; i--) {
if (i != sa.length() - 1) {
factor *= 10;
}
sum += m[sa[i]] * factor;
}
cout << "sum = " << sum << endl;
}
原文链接: https://www.cnblogs.com/bigben0123/p/13431780.html
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