istream& getline (istream& is, string& str, char delim);
istream& getline (istream& is, string& str);is是一个流，例如cin
str是一个string类型的引用，读入的字符串将直接保存在str里面
delim是结束标志，默认为换行符
1、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int a, b;
while(cin>>a>>b){ // 注意while处理多个case
cout<<a+b<<endl;
}
return 0;
}2、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int n;
cin>>n;
int a, b;
while(cin>>a>>b){
cout<<a+b<<endl;
}
return 0;
}3、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int a, b;
while(cin>>a>>b){
if(a==0 && b==0) break;
cout<<a+b<<endl;
}
return 0;
}4、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int n;
while(cin>>n){
if(n==0) break;
int sum=0;
while(n--){
int a;
cin>>a;
sum+=a;
}
cout<<sum<<endl;
}
return 0;
}5、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int n;
cin>>n;
while(n--){
int t;
cin>>t;
int sum=0;
while(t--){
int a;
cin>>a;
sum+=a;
}
cout<<sum<<endl;
}
return 0;
}6、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int n;
while(cin>>n){
int sum=0;
while(n--){
int a;
cin>>a;
sum+=a;
}
cout<<sum<<endl;
}
return 0;
}7、A+B
代码实现
#include<iostream>
using namespace std;
int main(){
int a;
int sum=0;
while(cin>>a){
sum+=a;
if(cin.get()=='\n'){
cout<<sum<<endl;
sum=0;
}
}
return 0;
}8、字符串排序
代码实现
#include<iostream>
#include<vector>
#include<string>
#include<algorithm>
using namespace std;
int main(){
int n;
cin>>n;
vector<string> vec;
while(n--){
string s;
cin>>s;
vec.push_back(s);
}
sort(vec.begin(),vec.end());
for(auto c:vec){
cout<<c<<' ';
}
}9、字符串排序
代码实现
#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
using namespace std;
int main(){
vector<string> ans;
string s;
while(cin>>s){
ans.push_back(s);
if(cin.get()=='\n'){
sort(ans.begin(), ans.end());
for(auto c:ans){
cout<<c<<' ';
}
cout<<endl;
ans.clear();
}
}
return 0;
}10、字符串排序
代码实现
#include<bits/stdc++.h>
using namespace std;
int main(){
string s,t;
while(cin>>s){
stringstream sstream(s); // 记录一行的输入流，为后序做准备
vector<string> vec;
while(getline(sstream, t, ',')){
vec.push_back(t);
}
sort(vec.begin(), vec.end());
for(int i=0;i<vec.size()-1;++i){
cout<<vec[i]<<',';
}
cout<<vec.back()<<endl;
}
return 0;
}ACM笔试的输入
#pragma once
#include <vector>
#include <map>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <iostream>
#include <stack>
#include <queue>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <algorithm>
#include <memory>
using namespace std;
/*
* 去空格输入至vec
*
* 输入："1 2 3 4 5"
* 输出：vector<int>
*/
vector<int> inputToVecInt() {
string line, word;
getline(cin, line);
stringstream sin(line);
vector<int> ret;
while (sin >> word) {
ret.push_back(stoi(word));
}
return ret;
}
/*
* 去空格输入至vec
*
* 输入："ab bc cd de e"
* 输出：vector<string>
*/
vector<string> inputToVecString() {
string line, word;
getline(cin, line);
stringstream sin(line);
vector<string> ret;
while (sin >> word) {
ret.push_back(word);
}
return ret;
}
/* 输入
4
1 2
3 4
5 6
7 8
*/
vector<int> getVecInt() {
vector<int> ret;
string line, word;
getline(cin, line);
stringstream sin(line);
while (sin >> word) {
ret.push_back(stoi(word));
}
return ret;
}
int main() {
int n;
cin >> n;
getchar();
vector<vector<int>> areas;
for (int i = 0; i != n; ++i) {
areas.emplace_back(getVecInt());
}
cout << Solution().solve(areas) << endl;
return 0;
}
// 如果是分别取出每一行，main函数有变化
int main() {
int n;
cin >> n;
getchar();
vector<vector<int>> areas;
for (int i = 0; i != n; ++i) {
areas.emplace_back(getVecInt());
}
for(const auto& area:areas){
cout << Solution().solve(area) << endl;
}
return 0;
}
/* 输入两个字符串
第一行为数据组数，接下来的每组数据中的第一行为字符串s,第二行为字符串t
4
hello
hello
hello
helloo
hello
hlllloo
hello
helo
*/
int main() {
int n;
cin >> n;
getchar();
vector<pair<string, string>> groups;
for (int i = 0; i != n; ++i) {
string s, t;
getline(cin, s);
getline(cin, t);
groups.push_back({ s,t });
}
for (const auto& pair : groups) {
int flag = Solution().isLongName(pair.first, pair.second);
if (flag) {
cout << "YES";
}
else {
cout << "NO";
}
}
return 0;
}
// 输入 [1 ,2, 3, 4, 5]
vector<int> getVecInt() {
vector<int> ret;
string line, word;
getline(cin, line);
string subLine = line.substr(1, line.size()-2);
stringstream sin(subLine);
while (getline(sin, word, ',')) {
ret.push_back(stoi(word));
}
return ret;
}
// 输入 [[1,2,3],[4,5,6],[7,8,9]]
vector<vector<int>> inputTwoMatrix(){
string line, word;
getline(cin, line);
string subLine = line.substr(1, line.size() - 2);
stringstream sin1(subLine);
vector<vector<int>> map;
int count = 0;
while (getline(sin1, word, ']')) {
string subWord;
if (count == 0) {
subWord = word.substr(1, word.size() - 1);
}
else {
subWord = word.substr(2, word.size() - 2);
}
stringstream sin2(subWord);
vector<int> vec;
while (getline(sin2, word, ',')) {
vec.push_back(stoi(word));
}
map.push_back(vec);
++count;
}
return map;
}
ACM笔试的输出
/*
* 从vec输出数字+空格
*
* 输入：vector<int>
* 输出："1 2 3 4 5"
*/
void printVecWithSpace(const vector<int>& vec) {
for (int i = 0; i != vec.size(); ++i) {
cout << vec[i];
if (i != vec.size() - 1) cout << " ";
}
cout << endl;
}
/*
* 从vec输出字符串+空格
*
* 输入：vector<string>
* 输出："ab bc cd de e"
*/
void printVecWithSpace(const vector<string>& vec) {
for (int i = 0; i != vec.size(); ++i) {
cout << vec[i];
if (i != vec.size() - 1) cout << " ";
}
cout << endl;
}