课程地址https://class.coursera.org/pkupop-001/assignment 题目地址 http://cxsjsxmooc.openjudge.cn/hw2/

pku_pp_2.cpp

/*写多了Java和Python，写C++全是坑。。。。。:| */
#include <cstdio>
#include <string>
#include <iostream>
#include <vector>
#include <sstream>
#include <cstdlib>
#include <cassert>

class Student
{
	/* data */
	std::string name;
	std::string id;	//学号
	//size_t age;
	unsigned int age;
	unsigned int gradeFirstYear;
	unsigned int gradeSecondYear;
	unsigned int gradeThirdYear;
	unsigned int gradeFourthYear;

public:
	Student(std::string p_name, unsigned int p_age, std::string p_id,
			unsigned int p_gradeFirstYear = 0,
			unsigned int p_gradeSecondYear = 0,
			unsigned int p_gradeThirdYear = 0,
			unsigned int p_gradeFourthYear = 0){

		name = p_name;
		id = p_id;
		age = p_age;
		gradeFirstYear = p_gradeFirstYear;
		gradeSecondYear = p_gradeSecondYear;
		gradeThirdYear = p_gradeThirdYear;
		gradeFourthYear = p_gradeFourthYear;
	}

	std::string getName(){
		return name;
	}

	std::string getId(){
		return id;
	}

	size_t getAge(){
		return age;
	}

	int averageGrade(){
		return (int)((gradeFourthYear + gradeThirdYear + gradeSecondYear + gradeFirstYear)/4.0);
	}
};


//split by delim
//http://stackoverflow.com/questions/236129/how-to-split-a-string-in-c
std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems) {
	    std::stringstream ss(s);
	    std::string item;
	    while (std::getline(ss, item, delim)) {
	        elems.push_back(item);
	    }
	    return elems;
	}


std::vector<std::string> split(const std::string &s, char delim) {
    std::vector<std::string> elems;
    split(s, delim, elems);
    return elems;
}


//string -> int
size_t trans(const std::string s){
	const char *p;
	p = s.c_str();
	return atoi(p);
}


int main(){
	unsigned int age;
	unsigned int gradeFirstYear;
	unsigned int gradeSecondYear;
	unsigned int gradeThirdYear;
	unsigned int gradeFourthYear;

	std::string input;

	std::cin >> input;
	std::vector<std::string> x = split(input,',');

	assert(x.size() > 6);

	std::string name = x[0];
	assert((age = trans(x[1])) > 0);
	std::string id = x[2];


	assert((gradeFirstYear = trans(x[3])) >= 0);
	assert((gradeSecondYear = trans(x[4])) >= 0);
	assert((gradeThirdYear = trans(x[5])) >= 0);
	assert((gradeFourthYear = trans(x[6])) >= 0);

	Student anonymous(name, age, id, gradeFirstYear, gradeSecondYear,gradeThirdYear, gradeFourthYear);
	std::cout << anonymous.getName() << ',' << anonymous.getAge() << ',' << anonymous.getId() << ',' << anonymous.averageGrade();

	return 0;
}