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.

{

char a[ N ] ;

printf ( \ a string : \ printf ( \ \ fun ( a );

printf ( \ \ puts ( a ); }

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ÀýÈ磺×Ö·û´®ÖÐÔ­ÓеÄÄÚÈÝΪ£ºabcdefg£¬Êä³ö£ºgfedcba¡£ #include #include #define N 81 void fun ( char *s ) {

length = strlen( s );

for (i = 0;i < length / 2; i++) {

tmp = s[i];

s[i] = s[length - i - 1];

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int i ,length; char tmp;

.

s[length - i - 1] = tmp; }

}

void main( ) { char a[N];

printf ( \ a string : \ printf ( \ \ fun ( a ); printf(\

printf ( \ \ puts ( a ); }

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#include void fun(char *s) { int i,j;

for(i=0,j=0; s[i]!='\\0'; i++) if(s[i]>='0' && s[i]<='9')

s[j++]=s[i];

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