学习Vc++大概要多长时间才能开发程序

学习Vc++大概要多长时间才能开发程序

学几分钟就可以了…………做一个…………hello world只是看你想做哪类程序而已，每种程序都需要不同的时间 ………………如果你之前学过别的语言的话，应该也不会说很久的。如果没学过别的语言就学VC++的话那就要超级长的时间了……建议先学C再学C++

没做完，再等等 #include using namespace std; class time { private: short int hour; short int minute; short int sec; short int year; short int month; short int day; bool am , pm , _12_24 , ad ; public: time() { setyear(); setmonth(); setday(); sethour(); setminute(); setsec(); cout << "\n\n" ; _12_24 = true; } void setyear() { a: cout << "请输入年:"; cin >> year; if (year == 0 ) { cout << "年份不得为0,请重新输入!" ; goto a; } else if (year > 0 ) { ad = true; } else if (year < 0 ) { ad = false ; } } void setmonth() { a: cout << "请输入月:"; cin >> month; if (month > 12) { cout << "输入错误,请重新输入!" << endl; goto a; } } void setday() { int i ; if (year % 4 == 0 ) { i = 29; } else { i = 28 ; } const int c[] = {31,i,31,30,31,30,31,31,30,31 ,30,31}; for (i = 0 ;i < (month-1) ;i++) { ; } a: cout << "请输入日:"; cin >> day; if (day > c[i]) { cout << "输入错误,请重新输入!" << endl; goto a; } } void sethour() { a: cout << "请输入时:"; cin >> hour; if (hour > 24) { cout << "输入错误,请重新输入!" << endl; goto a; } } void setminute() { a: cout << "请输入分:"; cin >> minute; if (minute > 60) { cout << "输入错误,请重新输入!" << endl; goto a; } } void setsec() { a: cout << "请输入秒:"; cin >> sec; if (sec > 60) { cout << "输入错误,请重新输入!" << endl; goto a; } } void display() { cout << endl ; if (year < 0 ) ad = false; else ad = true; if (ad == true) { cout << "公元" << year; } else if (ad == false) { double temp; temp = (double)year; temp = abs(temp); year = (int)temp; cout << "公元前" << year; } cout <<"年" << month << "月" << day << "日" << endl; if (_12_24 != true) { if (am == true) { cout << "上午" ; } else if (pm == true) { cout << "下午" ; } } cout << hour << "时" << minute << "分" << sec << "秒" << endl; } void conversion() { int flag; cout <> flag; switch(flag) { case 1: { if (_12_24 != true ) { _12_24 = true; am = pm = false; hour += 12; } else { break; } } case 2: { if (_12_24 != false) { _12_24 = false; if (hour >= 12 ) { pm = true; am = false; hour -= 12; break ; } if (hour < 12) { pm = false; am = true; break ; } } else { break; } } } } bool compare(time a) { if (year > a.viewyear() ) { return true; } else { if (month > a.viewmonth() ) { return true; } else { if (day > a.viewday() ) { return true; } else { if (hour > a.viewhour() ) { return true; } else { if (minute > a.viewminute()) { return true; } else { if (sec > a.viewsec()) { return true; } else { return false; } } } } } } } void operator + (int a ) { int flag , i; if (year % 4 == 0 ) { i = 29; } else { i = 28 ; } const int c[] = {31,i,31,30,31,30,31,31,30,31 ,30,31}; for (i = 0 ;i < (month-1);i++) { ; } cout << "\t\t\t1.给年加" << endl << "\t\t\t2.给月加" << endl << "\t\t\t3.给日加" << endl << "\t\t\t4.给时加" << endl << "\t\t\t5.给分加" << endl <<"\t\t\t6.给秒加" <> flag; switch(flag) { case 1: { year += a ; if (ad == false && year >= 0 ) { ad = true ; year += 1; } break; } case 2: { month += a; if (month >= 12 ) { year += 1 ; if (ad == false && year >= 0 ) { year += 1; ad == true; } month = 0 ; } break; } case 3: { int temp; day += a; if (day >= c[i]) { month += 1 ; day -= c[i]; if (month > 12 ) { year += 1 ; if (ad == false && year >= 0 ) { year += 1; ad == true; } month = 1 ; } } break; } case 4: { int temp; hour += a ; if (hour >= 24) { day += 1; hour = 0; if (day >= c[i]) { month += 1 ; day -= c[i]; if (month > 12 ) { year += 1 ; if (ad == false && year >= 0 ) { year += 1; ad == true; } month = 1 ; } } } break; } case 5: { int temp; minute += a ; if (minute >= 60) { hour += 1 ; if (hour >= 24) { day += 1; hour = 0; if (day >= c[i]) { month += 1 ; day -= c[i]; if (month > 12 ) { year += 1 ; if (ad == false && year >= 0 ) { year += 1; ad == true; } month = 1 ; } } } } break; } case 6: { int temp; sec += a; if (sec >= 60 ) { minute += 1 ; sec = 0 ; if (minute >= 60) { hour += 1 ; if (hour >= 24) { day += 1; hour = 0; if (day >= c[i]) { month += 1 ; day -= c[i]; if (month > 12 ) { year += 1 ; if (ad == false && year >= 0 ) { year += 1; ad == true; } month = 1 ; } } } } } } break; } } void operator - (int a ) { int flag; cout << "\t\t\t1.给年减" << endl << "\t\t\t2.给月减" << endl << "\t\t\t3.给日减" << endl << "\t\t\t4.给时减" << endl << "\t\t\t5.给分减" << endl << "\t\t\t6.给秒减" <> flag; switch(flag) { case 1: { year -= a; if (year <= 0 && ad == true) { year -= 1; ad = false ; } break; } case 2: { if (a < month) month -= a; else { year -= 1 ; if (year <= 0 && ad == true) { year -= 1; ad = false ; } if (a < 12 ) month = 12 - (a - month ) ; else cout <<"您输入的数大于或者等于12,请直接用年来减"; } break; } case 3: { int i ; if (year % 4 == 0 ) { i = 29; } else { i = 28 ; } const int c[] = {31,i,31,30,31,30,31,31,30,31 ,30,31}; for (i = 0 ;i < (month-1) ;i++) { ; } if (day >= c[i]) { cout << "您输入的数大于或者等于了这一月的天数,请直接用月减"; break; } if (a < day) day -= a; else { month -= 1; if (month == 0 ) { month = 12 ; year -= 1 ; if (year <= 0 && ad == true ) { year -= 1; } } day = c[i] - (a - day) - 1 ; } break; } case 4: { if (a <= hour) hour -= a ; else { } break; } case 5: { if (a <= minute) minute -= a ; else { } break; } case 6: { if (a <= sec) sec -= a; else { } break; } } } };