[英]Skip 2 Index In the body of for loop, Python VS C++
在下面的第一个代码中(使用 for 循环)当我想通过增加 for 循环体内的索引来跳过 2 索引时,它会忽略i = i+2
并仅使用for i in range (len(c))
短语,而在 c++ 中,我们可以通过for (int i = 0; i <sizeof(c);i++){i += 2;}
在 for 循环体中执行此操作。 无论如何使用for循环(通过更正第一个代码)来实现这个还是我必须使用一个while循环(第二个代码)?
第一个代码(For循环)
def jumpingOnClouds(c):
count_jumps = 0
for i in range (len(c)):
if (i+2 <len(c) and c[i] == 0 and c[i+2] ==0):
i = i+2
count_jumps+=1#It doesnt let me to update i in the while loop
elif (i+1 <len(c) and c[i] == 0 and c[i+1] ==0):
count_jumps+=1
else:
pass
return(count_jumps)
c = [0, 0, 0, 1, 0, 0]
jumpingOnClouds(c)
第二个代码(While 循环)
def jumpingOnClouds(c):
count_jumps = 0
i = 0
while( i < len(c)):
if (i+2 <len(c) and c[i] == 0 and c[i+2] ==0):
i = i+2
count_jumps+=1
elif (i+1 <len(c) and c[i] == 0 and c[i+1] ==0):
count_jumps+=1
i = i+1
else:
i = i+1
return(count_jumps)
c = [0, 0, 0, 1, 0, 0]
jumpingOnClouds(c)
您可以使用continue
跳过。 您只需要一个条件为True
。
def jumpingOnClouds(c):
skipCondition = False
count_jumps = 0
for i in range (len(c)):
if skipCondition:
skipCondition = False
continue
if (i+2 <len(c) and c[i] == 0 and c[i+2] ==0):
count_jumps+=1#It doesnt let me to update i in the while loop
skipCondition = True
continue
elif (i+1 <len(c) and c[i] == 0 and c[i+1] ==0):
count_jumps+=1
else:
pass
return(count_jumps)
c = [0, 0, 0, 1, 0, 0]
jumpingOnClouds(c)
放置continue
将继续迭代,但在此之前,它会使skipCondition = True
。 下一次迭代, skipCondition
将为True
,因此您将再次跳过,但将skipCondition
设置回False
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