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int a = 0; //È«¾Ö³õʼ»¯Çø
char *p1; //È«¾Öδ³õʼ»¯Çø
void main()
{
    int b; //Õ»
    char s[] = "abc"; //Õ»
    char *p2; //Õ»
    char *p3 = "123456"; //123456{post.content}ÔÚ³£Á¿Çø£¬p3ÔÚÕ»ÉÏ
    static int c = 0; //È«¾Ö£¨¾²Ì¬£©³õʼ»¯Çø
    p1 = (char *)malloc(10); //·ÖÅäµÃÀ´µÃ10×Ö½ÚµÄÇøÓòÔÚ¶ÑÇø
    p2 = (char *)malloc(20); //·ÖÅä


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