{"id":65597,"date":"2026-01-25T12:08:42","date_gmt":"2026-01-25T04:08:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/65597.html"},"modified":"2026-01-25T12:08:42","modified_gmt":"2026-01-25T04:08:42","slug":"%e3%80%9020%e5%a4%a9%e5%ad%a6c%e8%af%ad%e8%a8%80%e3%80%91day-15-%e5%8a%a8%e6%80%81%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/65597.html","title":{"rendered":"\u301020\u5929\u5b66C\u8bed\u8a00\u3011Day 15: \u52a8\u6001\u5185\u5b58\u7ba1\u7406"},"content":{"rendered":"

\u301020\u5929\u5b66C\u8bed\u8a00\u3011Day 15: \u52a8\u6001\u5185\u5b58\u7ba1\u7406<\/h2>\n

📅 \u5b66\u4e60\u65f6\u95f4：4-5\u5c0f\u65f6
\n🎯 \u5b66\u4e60\u76ee\u6807：\u638c\u63e1malloc\u3001calloc\u3001realloc\u3001free\u7684\u4f7f\u7528
\n💡 \u96be\u5ea6：\u2605\u2605\u2605\u2605\u2606<\/p>\n

\n

📝 Day 14 \u7ec3\u4e60\u9898\u7b54\u6848<\/h3>\n

\u7ec3\u4e601\u7b54\u6848：\u53cd\u8f6c\u5355\u8bcd\u987a\u5e8f<\/h4>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\n#<\/span>include<\/span> <string.h><\/span><\/span><\/p>\n

void<\/span> reverse<\/span>(<\/span>char<\/span> *<\/span>start,<\/span> char<\/span> *<\/span>end)<\/span> {<\/span>
\n while<\/span> (<\/span>start <<\/span> end)<\/span> {<\/span>
\n char<\/span> temp =<\/span> *<\/span>start;<\/span>
\n *<\/span>start++<\/span> =<\/span> *<\/span>end;<\/span>
\n *<\/span>end—<\/span> =<\/span> temp;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

void<\/span> reverse_words<\/span>(<\/span>char<\/span> *<\/span>s)<\/span> {<\/span>
\n int<\/span> len =<\/span> strlen<\/span>(<\/span>s)<\/span>;<\/span>
\n \/\/ \u5148\u6574\u4f53\u53cd\u8f6c<\/span>
\n reverse<\/span>(<\/span>s,<\/span> s +<\/span> len –<\/span> 1<\/span>)<\/span>;<\/span><\/p>\n

\/\/ \u518d\u53cd\u8f6c\u6bcf\u4e2a\u5355\u8bcd<\/span>
\n char<\/span> *<\/span>start =<\/span> s;<\/span>
\n while<\/span> (<\/span>*<\/span>start)<\/span> {<\/span>
\n while<\/span> (<\/span>*<\/span>start ==<\/span> ' '<\/span>)<\/span> start++<\/span>;<\/span>
\n if<\/span> (<\/span>!<\/span>*<\/span>start)<\/span> break<\/span>;<\/span><\/p>\n

char<\/span> *<\/span>end =<\/span> start;<\/span>
\n while<\/span> (<\/span>*<\/span>end &&<\/span> *<\/span>end !=<\/span> ' '<\/span>)<\/span> end++<\/span>;<\/span><\/p>\n

reverse<\/span>(<\/span>start,<\/span> end –<\/span> 1<\/span>)<\/span>;<\/span>
\n start =<\/span> end;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
\n{<\/span>
\n char<\/span> str[<\/span>]<\/span> =<\/span> "Hello World"<\/span>;<\/span>
\n reverse_words<\/span>(<\/span>str)<\/span>;<\/span>
\n printf<\/span>(<\/span>"\u7ed3\u679c: %s\\\\n"<\/span>,<\/span> str)<\/span>;<\/span> \/\/ "World Hello"<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ec3\u4e602\u7b54\u6848：\u5220\u9664\u7a7a\u683c<\/h4>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

void<\/span> remove_spaces<\/span>(<\/span>char<\/span> *<\/span>s)<\/span> {<\/span>
\n char<\/span> *<\/span>p =<\/span> s;<\/span>
\n while<\/span> (<\/span>*<\/span>s)<\/span> {<\/span>
\n if<\/span> (<\/span>*<\/span>s !=<\/span> ' '<\/span>)<\/span> {<\/span>
\n *<\/span>p++<\/span> =<\/span> *<\/span>s;<\/span>
\n }<\/span>
\n s++<\/span>;<\/span>
\n }<\/span>
\n *<\/span>p =<\/span> '\\\\0'<\/span>;<\/span>
\n}<\/span><\/p>\n

int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
\n{<\/span>
\n char<\/span> str[<\/span>]<\/span> =<\/span> "H e l l o W o r l d"<\/span>;<\/span>
\n remove_spaces<\/span>(<\/span>str)<\/span>;<\/span>
\n printf<\/span>(<\/span>"\u7ed3\u679c: %s\\\\n"<\/span>,<\/span> str)<\/span>;<\/span> \/\/ "HelloWorld"<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ec3\u4e603\u7b54\u6848：\u5927\u5c0f\u5199\u8f6c\u6362<\/h4>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span><\/p>\n

void<\/span> to_upper<\/span>(<\/span>char<\/span> *<\/span>s)<\/span> {<\/span>
\n while<\/span> (<\/span>*<\/span>s)<\/span> {<\/span>
\n if<\/span> (<\/span>*<\/span>s >=<\/span> 'a'<\/span> &&<\/span> *<\/span>s <=<\/span> 'z'<\/span>)<\/span> {<\/span>
\n *<\/span>s -=<\/span> 32<\/span>;<\/span>
\n }<\/span>
\n s++<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

void<\/span> to_lower<\/span>(<\/span>char<\/span> *<\/span>s)<\/span> {<\/span>
\n while<\/span> (<\/span>*<\/span>s)<\/span> {<\/span>
\n if<\/span> (<\/span>*<\/span>s >=<\/span> 'A'<\/span> &&<\/span> *<\/span>s <=<\/span> 'Z'<\/span>)<\/span> {<\/span>
\n *<\/span>s +=<\/span> 32<\/span>;<\/span>
\n }<\/span>
\n s++<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
\n{<\/span>
\n char<\/span> s1[<\/span>]<\/span> =<\/span> "Hello World"<\/span>;<\/span>
\n char<\/span> s2[<\/span>]<\/span> =<\/span> "Hello World"<\/span>;<\/span>
\n to_upper<\/span>(<\/span>s1)<\/span>;<\/span>
\n to_lower<\/span>(<\/span>s2)<\/span>;<\/span>
\n printf<\/span>(<\/span>"\u5927\u5199: %s\\\\n"<\/span>,<\/span> s1)<\/span>;<\/span>
\n printf<\/span>(<\/span>"\u5c0f\u5199: %s\\\\n"<\/span>,<\/span> s2)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u7ec3\u4e604\u7b54\u6848：\u5b57\u6bcd\u5f02\u4f4d\u8bcd<\/h4>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\n#<\/span>include<\/span> <string.h><\/span><\/span><\/p>\n

int<\/span> is_anagram<\/span>(<\/span>const<\/span> char<\/span> *<\/span>s1,<\/span> const<\/span> char<\/span> *<\/span>s2)<\/span> {<\/span>
\n int<\/span> count[<\/span>26<\/span>]<\/span> =<\/span> {<\/span>0<\/span>}<\/span>;<\/span><\/p>\n

while<\/span> (<\/span>*<\/span>s1)<\/span> {<\/span>
\n if<\/span> (<\/span>*<\/span>s1 >=<\/span> 'a'<\/span> &&<\/span> *<\/span>s1 <=<\/span> 'z'<\/span>)<\/span> count[<\/span>*<\/span>s1 –<\/span> 'a'<\/span>]<\/span>++<\/span>;<\/span>
\n s1++<\/span>;<\/span>
\n }<\/span><\/p>\n

while<\/span> (<\/span>*<\/span>s2)<\/span> {<\/span>
\n if<\/span> (<\/span>*<\/span>s2 >=<\/span> 'a'<\/span> &&<\/span> *<\/span>s2 <=<\/span> 'z'<\/span>)<\/span> count[<\/span>*<\/span>s2 –<\/span> 'a'<\/span>]<\/span>—<\/span>;<\/span>
\n s2++<\/span>;<\/span>
\n }<\/span><\/p>\n

for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> 26<\/span>;<\/span> i++<\/span>)<\/span> {<\/span>
\n if<\/span> (<\/span>count[<\/span>i]<\/span> !=<\/span> 0<\/span>)<\/span> return<\/span> 0<\/span>;<\/span>
\n }<\/span>
\n return<\/span> 1<\/span>;<\/span>
\n}<\/span><\/p>\n

int<\/span> main<\/span>(<\/span>void<\/span>)<\/span>
\n{<\/span>
\n printf<\/span>(<\/span>"listen\u548csilent: %s\\\\n"<\/span>,<\/span>
\n is_anagram<\/span>(<\/span>"listen"<\/span>,<\/span> "silent"<\/span>)<\/span> ?<\/span> "\u662f"<\/span> :<\/span> "\u5426"<\/span>)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\n

1. \u77e5\u8bc6\u70b9\u6982\u8ff0<\/h3>\n

\u4eca\u5929\u6211\u4eec\u5c06\u5b66\u4e60：<\/p>\n