C语言堆内存破坏
0
悬赏园豆：10
[已解决问题]
解决于 2013-09-26 16:51
1 void calc_probability(int num) 2 { 3 int i = 0, j = 0 , k = 0; //数组指针 4 #define SIZE_NUM 8 5 int *array_num = NULL; 6 int *remember_num = NULL; 7 char **array_detail[SIZE_NUM] = {NULL}; 8 int len_array = 0; 9 int count_num = 0; 10 int count = 0; 11 12 len_array = 2 * num - 1; 13 array_num = (int*)calloc(len_array, sizeof(int)); 14 array_detail[SIZE_NUM] = (char **)calloc(len_array, sizeof(char*)); 15 remember_num = (int*)calloc(len_array, sizeof(int)); 16 17 for(i = 0; i < len_array; i++) 18 { 19 array_num[i] = i + 2; 20 array_detail[SIZE_NUM][i] = (char*)calloc(count_num + 1, sizeof(char)); 21 } 22 23 for(i = 0; i < len_array; i++) 24 { 25 count = 0; // 计数清零 26 for(j = 1; j <= num; j++) 27 { 28 for(k = 1; k <= num; k++) 29 { 30 if(j + k == array_num[i]) 31 { 32 sprintf(&array_detail[SIZE_NUM][i][count_num], "(%d, %d)", j, k); 33 printf("%s", &array_detail[SIZE_NUM][i][count_num]); 34 count_num++; 35 count++; 36 array_detail[SIZE_NUM][i] = (char*)realloc(array_detail[SIZE_NUM][i], (count_num + 1) * sizeof(char)); 37 } 38 } 39 } 40 remember_num[i] = count; 41 } 42 43 for(i = 0; i < len_array; i ++) 44 { 45 printf("数字 %d 的个数是: %d\n", i + 2, remember_num[i]); 46 for(j = 0; j < count_num; j++) 47 { 48 printf("%s ", &array_detail[SIZE_NUM][i][j]); 49 } 50 printf("\n"); 51 } 52 53 54 //释放内存 55 free(remember_num); 56 remember_num = NULL; 57 58 free(array_num); 59 array_num = NULL; 60 61 for(i = 0; i < len_array; i++) 62 { 63 free(array_detail[SIZE_NUM][i]); 64 array_detail[SIZE_NUM][i] = NULL; 65 } 66 free(array_detail[SIZE_NUM]); 67 array_detail[SIZE_NUM] = NULL; 68 69 return; 70 71 }
主函数调用时在36行，堆内存报错，这个函数肯定有问题，但不知哪里错误了？
请大牛指点.
最佳答案
0
不知道C语言数组是从0开始的吗?
int arr[8]; //八个元素的数组
arr[7] = 1; //访问最后一个元素
arr[8] = 1; //这个就越界了
通篇的array_detail[SIZE_NUM]，不知道你想干啥，全部越界
收获园豆：10
1 void calc_probability(int num) 2 { 3 int i = 0, j = 0 , k = 0; 4 int *array_num = NULL; 5 int *remember_num = NULL; 6 char (**array_detail)[SIZE_NUM] = NULL; //数组指针 7 int len_array = 0; 8 int count_num = 0; 9 int count = 0; 10 11 len_array = 2 * num - 1; 12 array_num = (int*)calloc(len_array, sizeof(int)); 13 array_detail = (char (**)[SIZE_NUM])calloc(len_array, sizeof(char(*))); //这里注意是sizeof(char(*)不是sizeof(char(*)[SIZE_NUM]) 14 remember_num = (int*)calloc(len_array, sizeof(int)); 15 16 for(i = 0; i < len_array; i++) 17 { 18 array_num[i] = i + 2; 19 array_detail[i] = (char(*)[SIZE_NUM])calloc(count_num + 1, sizeof(char[SIZE_NUM])); 20 } 21 22 for(i = 0; i < len_array; i++) 23 { 24 count = 0; // 计数清零 25 count_num = 0; 26 for(j = 1; j <= num; j++) 27 { 28 for(k = 1; k <= num; k++) 29 { 30 if(j + k == array_num[i]) 31 { 32 sprintf(array_detail[i] + count_num, "(%d, %d)", j, k); 33 printf("%s", array_detail[i] + count_num); 34 count_num++; 35 count++; 36 array_detail[i] = (char(*)[SIZE_NUM])realloc(array_detail[i], (count_num + 1) * sizeof(char[SIZE_NUM])); 37 memset(array_detail[i] + count_num, 0x0, SIZE_NUM); 38 } 39 } 40 } 41 remember_num[i] = count; 42 } 43 44 for(i = 0; i < len_array; i ++) 45 { 46 printf("数字 %d 的个数是: %d\n", i + 2, remember_num[i]); 47 for(j = 0; j < remember_num[i]; j++) 48 { 49 printf("%s ", array_detail[i] + j); 50 } 51 printf("\n"); 52 } 53 54 55 //释放内存 56 free(remember_num); 57 remember_num = NULL; 58 59 free(array_num); 60 array_num = NULL; 61 62 for(i = 0; i < len_array; i++) 63 { 64 free(array_detail[i]); 65 array_detail[i] = NULL; 66 } 67 free(array_detail); 68 array_detail = NULL; 69 70 return; 71 72 }
这样改就没有问题了。谢谢大家的帮助。
