反转一个字符串。
1
void reverse( char * str) {
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char tmp;
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int len;
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len = strlen(str);
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for ( int i = 0 ;i < len / 2 ; ++ i) {
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tmp = char [i];
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str[i] = str[len - i - 1 ];
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str[len - i - 1 ] = tmp;
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}
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}
void reverse( char * str) {2
char tmp;3
int len;4
len = strlen(str);5
for ( int i = 0 ;i < len / 2 ; ++ i) {6
tmp = char [i];7
str[i] = str[len - i - 1 ];8
str[len - i - 1 ] = tmp;9
} 10
}

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