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krahets 2023-08-25 02:22:25 +08:00
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commit 42a06dc6bb
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29
chapter_computational_complexity/iteration_and_recursion.md
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@ -1,5 +1,6 @@
---
comments: true
status: new
---
# 2.2   迭代与递归
@ -134,7 +135,7 @@ comments: true
// 循环求和 1, 2, ..., n-1, n
while (i <= n) {
res += i;
i += 1; // 更新条件变量
i++; // 更新条件变量
}
return res;
}
@ -150,7 +151,7 @@ comments: true
// 循环求和 1, 2, ..., n-1, n
while (i <= n) {
res += i;
i += 1; // 更新条件变量
i++; // 更新条件变量
}
return res;
}
@ -235,12 +236,12 @@ comments: true
int whileLoopII(int n) {
int res = 0;
int i = 1; // 初始化条件变量
// 循环求和 1, 2, 4, 5...
// 循环求和 1, 4, ...
while (i <= n) {
res += i;
i += 1; // 更新条件变量
res += i;
i *= 2; // 更新条件变量
// 更新条件变量
i++;
i *= 2;
}
return res;
}
@ -253,12 +254,12 @@ comments: true
int whileLoopII(int n) {
int res = 0;
int i = 1; // 初始化条件变量
// 循环求和 1, 2, 4, 5...
// 循环求和 1, 4, ...
while (i <= n) {
res += i;
i += 1; // 更新条件变量
res += i;
i *= 2; // 更新条件变量
// 更新条件变量
i++;
i *= 2;
}
return res;
}
@ -271,12 +272,12 @@ comments: true
"""while 循环（两次更新）"""
res = 0
i = 1 # 初始化条件变量
# 循环求和 1, 2, 4, 5...
# 循环求和 1, 4, ...
while i <= n:
res += i
i += 1 # 更新条件变量
res += i
i *= 2 # 更新条件变量
# 更新条件变量
i += 1
i *= 2
return res
```