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void swap(int *a,int *b){
    int *tmp;
    *tmp=*a;
    *a=*b;
    *b=*tmp;
}
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int data[4];
int *p=data;»òint *p;p=data;
---------------------------------------------------
int data[2][3];
int *p=data;
int i=0;
while(i<2*3){
    scanf("%d",&p[i++]);
}
i=0;
while(i<2*3){
    printf("%d\t",p[i++]);
}
printf("\n");
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int data[2][3]={1,2,3,4,5,6};
int (*pd)[3]=data;»òint (*pd)[3];pd=data;
int i=0,j=0;
while(i<2){
    while(j<3){
        printf("%d\t",*(*(pd+i)+j++));
    }
    i++;
    j=0;
    printf("\n");
}
//(*pd)[3]±íʾָÕëpdÖ¸ÏòµÄÊÇһάÊý×飬Õâ¸öÊý×éÊÇintµÄ£¬¶øÇÒº¬ÓÐÈý¸öÔªËØ¡£»¹ÓжþάÊý×鱨ÐëÃ÷È·Ö¸¶¨ÁеĴóС£¬ÕâµãºÜÈÝÒ×Àí½â£¬ÀýÈçÉÏÃæ¿ÉÒÔд³É
int data[][3]={1,2,3,4,5,6};
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int data[2][]={1,2,3,4,5,6};
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char strings[][10]={"beijing","shanghai","tianjin","chongqi


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C preprocessor

http://en.wikipedia.org/wiki/C_preprocessor
C preprocessor
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The C preprocessor (cpp) is the preprocessor for the C programming language. In many C implementations, it is a separate program invoked by the compiler as the first part ......

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#define LEN sizeof(struct link)
struct link
{
char ch;
struct link *next;
}*string;
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