å
æ©å±ç¬¬ä¸ç»´ï¼ç¶å 对äºå¤åºæ¥ç æ¯ä¸ªé½ç³è¯·ä¸ä¸ª2个å
ç´ å¤§å°ç空é´å°±å¥½äºã
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int **a, i;
a=(int**) malloc(sizeof(int*)*100);
for(i = 0; i < 100; i ++)
a[i] = (int*)malloc(sizeof(int)*2);
//ä»¥ä¸ ç¬¬ä¸æ¬¡ç³è¯·å®æ¯ï¼ 为a[100][2]
a=(int**) realloc(a, sizeof(int*)*150);//æ©å¤§å°150
//ç±äºreallocå¯ä»¥ä¿è¯åé¢é¨åå¼ä¸åï¼æ以 å100个ä¸å¨ã
for(i = 100; i < 150; i ++)
a[i] = (int*)malloc(sizeof(int)*2);