{for-while loop}
espc 社長兼教學 林馥唯
{for-while loop}
espc 社長兼教學 林馥唯
Print 1 to 10 ???
# PRESENTING CODE
You can do like this
#include <iostream>
using namespace std;
int main()
{
cout <<"1 2 3 4 5 6 7 8 9 10 ";
return 0;
}How about do like this!
# PRESENTING CODE
#include <iostream>
using namespace std;
int main()
{
for (int i=1;i<=10;i++){
cout<<i<<" ";
}
return 0;
}It just look like...
# PRESENTING CODE
How about print 1 to 10000??
# PRESENTING CODE
int main()
{
cout <<"1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36"
return 0;
}How about print 1 to 10000??
# PRESENTING CODE
int main()
{
cout <<"1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36"
return 0;
}
# PRESENTING CODE
遞增/遞減 運算子
# PRESENTING CODE
\
# PRESENTING CODE
While Loop
#include <iostream>
using namespace std;
int main()
{
while (condition){
do something;
}
return 0;
}So how to use while loop to print 1~10000
# PRESENTING CODE
#include <iostream>
using namespace std;
int main()
{
int cnt = 1;
while (cnt<=10000) {
cout<<cnt<<" ";
cnt++;
}
return 0;
}<key>while loop內 變數值必須更新
# PRESENTING CODE
Do-while loop
#include <iostream>
using namespace std;
int main()
{
do{
do somthing
}while(condition);
return 0;
}# PRESENTING CODE
Do-while V.S. While
continue/break
# PRESENTING CODE
# PRESENTING CODE
For Loop
#include <iostream>
using namespace std;
int main()
{
for (initial;condition;change){
do something;
}
return 0;
}For Loop
# PRESENTING CODE
for (初始值;檢查條件;調整){
執行敘述
}
1.用;相隔
2.需有初始化
3.執行迴圈之條件
4.注意i之生命週期
While v.s. for
# PRESENTING CODE
#include<iostream>
using namespace std;
int main(){
int cnt = 1;
while (cnt<=100) {
cout << cnt << endl;
cnt++;
}
return 0;
}
#include<iostream>
using namespace std;
int main(){
for(int cnt = 1;cnt<=100;cnt++){
cout << cnt << endl;
}
return 0;
}
# PRESENTING CODE
choose for or while
<key>是否知道迴圈運作次數
while
用於不知迴圈所需運作次數
=>吃輸入直到 EOF
for
用於知道迴圈所需運作次數
=>已知有 n 個數字要輸入
Practice
| ZeroJudge | Link |
| ZeroJudge | a058: MOD3 | Link |
| ZeroJudge | d074: 電腦教室 | Link |
| ZeroJudge | a148: You Cannot Pass?! | Link |