小结:很笨的原始方法
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
ifstream file1("text.txt");
char a[20],ch;
int i=0;
while(file1.get(ch)){//文件中读取的数据存入数组
cout<<ch;
a[i]=ch;
i++;
}
file1.close();
cout<<endl;
string mon[12]={"Jan","Feb","Mar","Apr","May","June","July","Aug","Sep","Oct","Nov","Dec"};
int month,day,year;
int j;
//cout<<a[1]-'0'<<endl;
for(j=0;j<i;j++){
if(a[j]=='/'){
month=(a[j-1]-'0')+(a[j-2]-'0')*10;
break;
//cout<<a[j-1]-'0'<<","<<a[j-2]-'0'<<endl;
}
}
//cout<<month<<endl;
for(int k=j+1;k<i;k++){
if(a[k]=='/'){
day=(a[k-1]-'0')+(a[k-2]-'0')*10;
//cout<<a[k-1]-'0'<<","<<a[k-2]-'0'<<endl;
}
if(a[k+1]=='\0')
year=(a[k]-'0')+(a[k-1]-'0')*10+(a[k-2]-'0')*100+(a[k-3]-'0')*1000;
}
cout<<mon[month-1]<<" "<<day<<","<<year;
return 0;
}
找到一个很好的 https://blog.csdn.net/qq_32925781/article/details/79423803 参考
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
using namespace std;
int main(){
ifstream is("/Users/.../MyDate.txt");
if (!is){
cerr << "File cannot be opened!" << endl;
exit(EXIT_FAILURE);
}
string myMonth[13] = {"","Jan","Feb","Mar","Apr","May","June","July","Aug","Sept","Oct","Nov","Dec"};
string line;
int month;
int day;
int year;
while (is >> line) {
month = stoi(line.substr(0,2));
day = stoi(line.substr(3,2));
year = stoi(line.substr(6,4));
cout << setw(4) << left << setfill(' ') << myMonth[month] << " ";
cout << setw(2) << right << setfill('0') << day << "," << year << endl;
}
return 0;
}