好的,所以我会开始说我对编程很陌生,不要介意这个论坛,所以如果有更多/更少的信息,我应该让我知道。我希望我不是在问一个愚蠢的问题:P
无论如何,我正在尝试编写我的第一个自己的工作程序(除了一个简单的2d数组程序作为乘法程序)。在其中我基本上试图建立一个简单的博弈论模型。你有两个人可以做出选择,这是预先确定的,我将其表示为“int trait”,即0或1.但是我将其扩展到最初有100个人,并且一次选择2个人进行随机测试,根据他们的特点,他们会分配不同的分数来确定他们有多少“后代”需要进行进一步的测试,但这并不完全重要,因为我的问题是在此之前。
我通过制作结构来设置我的测试科目:
struct Person { //used for testing and reproduction initialization
int trait; // 0 for normal - 1 for phycopath
int score; // reproductive score
} ;
struct Person *id;
然后像这样分配内存:
id = (struct Person *) malloc(n * sizeof(struct Person));
并初始化结构:
for(i = 0; i < nn; i++) {
id[i * sizeof(struct Person)].trait = 0;
id[i * sizeof(struct Person)].score = 0;
}
for(i = nn; i < n; i++) {
id[i * sizeof(struct Person)].trait = 1;
id[i * sizeof(struct Person)].score = 0; }
在你说我做错了之前(我并不是说我不是),只是一些思考的问题,我检查它之后立即正确初始化:
for(i = 0; i < n; i++) {
printf("id[%d].trait = %d\t", i, id[i * sizeof(struct Person)].trait);
printf("id[%d].score = %d\n", i, id[i * sizeof(struct Person)].score);
}
现在我的问题是在我的代码中的某个地方(我已经做了一些测试向我指出问题的位置),测试对象的特征在我介于和包括26之间时始终被改变。和37(每次都是)。这告诉我,代码中的某个地方我的变量id []正在被玩弄,但我不记得它在初始化和测试之间。我的测试表明问题在于:
for(i = 0; i < nn; i++) {
if(p > 0) {
srand( time(NULL) );
randn = rand() % p; //MAKE SURE THIS IS OK
storea = randn;
storeaa = randf[randn];
testa = storeaa * sizeof(struct Person);
testa(以及稍后在程序中的testb)用于以与上述test-print语句完全相同的方式调用测试对象。</ p>
程序编译并运行(只是不是我想要的方式),大约每十次我尝试运行它我得到一个错误:
断言`(old_top ==(((mbinptr)(((char *)&amp;((av) - &gt; bins [((1) - 1)* 2])) - __builtin_offsetof(struct malloc_chunk,fd))))&amp;&amp; old_size == 0)|| ((unsigned long)(old_size)&gt; =(无符号长 long)(((__ builtin_offsetof(struct malloc_chunk,fd_nextsize))+((2 * (sizeof(size_t))) - 1))&amp; 〜((2 *(sizeof(size_t))) - 1)))&amp;&amp; ((old_top) - &gt; size&amp; 0x1)&amp;&amp; ((unsigned long)old_end&amp; pagemask)== 0)' 失败。
这对我来说,随机数发生器可能是错误的?或内存泄漏 - 一些在哪里?说实话,我真的很无能为力。
我很抱歉被抽出来,希望不要太困惑的解释。我已经在这个问题上工作了2天,花了很多时间在网上进行研究,以免误解我的问题。任何出错的想法都将受到高度赞赏。为了完成这个问题,我将在下面发布我的非常草率的代码:
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <time.h>
struct Person { //used for testing and reproduction initialization
int trait; // 0 for normal - 1 for phycopath
int score; // reproductive score
} ;
struct Person *id;
int n; // number of individuals
struct Person *temp;
//remember to type functions before main!!!
int main () {
//beginning of initialization
int n = 100; // number of members MUST BE EVEN!!!!!!
int nn = (n / 2);
printf("n = %d\nnn = %d\n", n, nn);
if(n == 100) { printf("n set to %d \n", n); }
id = (struct Person *) malloc(n * sizeof(struct Person));//allocate memory for id
temp = (struct Person *) malloc(n * sizeof(struct Person));
assert(id != NULL);
assert(temp != NULL);
int i = 0;
int testa;
int testb; //two subjects to be used for test
//initialize rand-function array
int p = n; //used for decrementing array and random size
int *randf;
int *randt;
int randn;
int t;
int r;
int kids;
int offs;
int tests = 0;
int testkids = 0;
int storea;
int storeaa;
int storeb;
int storebb;
int size = sizeof(struct Person);
randf = malloc( n * sizeof(int));
randt = malloc( p * sizeof(int));
randf = realloc(randf, n * sizeof(int)); //allocation to randf
assert(randf != NULL);
assert(randt != NULL);
for(i = 0; i < nn; i++) {
printf("initialization of non-traits begun\n");
id[i * sizeof(struct Person)].trait = 0;
id[i * sizeof(struct Person)].score = 0;
printf("Person %d set\n", i);
}
for(i = nn; i < n; i++) {
printf("initialization of with-traits begun\n");
id[i * sizeof(struct Person)].trait = 1;
id[i * sizeof(struct Person)].score = 0;
printf("Person %d set\n", i);
} //initialization complete
for(i = 0; i < n; i++) {
printf("id[%d].trait = %d\t", i, id[i * sizeof(struct Person)].trait);
printf("id[%d].score = %d\n", i, id[i * sizeof(struct Person)].score);
}
//beginning of test
i = 0;
for(i = 0; i < n; i++) {
randf[i] = i;
}
//selection and usage of test subjects
i = 0;
t = 0;
r = 0;
for(i = 0; i < nn; i++) {
if(p > 0) {
srand( time(NULL) );
randn = rand() % p; //MAKE SURE THIS IS OK
storea = randn;
storeaa = randf[randn];
testa = storeaa * size;
//printf("%d\n", id[testa].trait);
p = p - 1;
randt = realloc(randt, p * sizeof(int));
assert(randt != NULL);
for(t = 0, r = 0; t < p; t++) { //copy randf over to randt exluding t = randn
if(t != randn) {
randt[r] = randf[t];
r++;
}
else {}
}
randf = realloc(randf, p * sizeof(int));
assert(randf != NULL);
// randf = randt;//copy randt back over to randf
for (t=0; t<p; t++) {
randf[t] = randt[t]; }
srand( time(NULL) );
randn = rand() % p; //MAKE SURE THIS IS RIGHT
storeb = randn;
storebb = randf[randn];
testb = storebb * size;
//printf("%d\n", id[testb].trait);
p = p - 1;
if( p > 0 ) {
randt = realloc(randt, p * sizeof(int));
assert(randt != NULL);
for(t = 0, r = 0; t < p; t++) { //same as before
if(t != randn) {
randt[r] = randf[t];
r++;
}
else{}
}
randf = realloc(randf, p * sizeof(int));
assert(randf != NULL);
for (t=0; t<p; t++) {
randf[t] = randt[t]; }
}
}
tests++;
//TESTING TIME!!!
if(id[testa].trait == 0 && id[testb].trait == 0) {
id[testa].score = id[testa].score + 2;
id[testb].score = id[testb].score + 2;
//printf("Test Successful %d\n", tests);
} else if(id[testa].trait == 0 && id[testb].trait == 1) {
id[testa].score = id[testa].score + 1;
id[testb].score = id[testb].score + 3;
//printf("Test Successful %d\n", tests);
} else if(id[testa].trait == 1 && id[testb].trait == 0) {
id[testa].score = id[testa].score + 3;
id[testb].score = id[testb].score + 1;
//printf("Test Successful %d\n", tests);
} else if(id[testa].trait == 1 && id[testb].trait == 1) {
//printf("Test Successful %d\n", tests);
// NO CHANGE
}else {
printf("ERROR: Test %d\n", tests);
printf("id[testa].trait = %d\t%d,%d\n", id[testa].trait, storea, storeaa);
printf("id[testb].trait = %d\t%d,%d\n", id[testb].trait, storeb, storebb);
}
} //END OF TESTING
//Commence Reproduction
for(i = 0, kids = 0; i < n; i++) {
kids = kids + id[i * sizeof(struct Person)].score;
testkids ++;
//printf("%d kids calculated\n %d parents completed\n", kids, testkids);
}
temp = realloc(temp, kids * sizeof(struct Person));//REMEMBER TO FREE
assert(temp != NULL);
r = 0;
for(i = 0; i < n; i++) {
for(offs = id[i * sizeof(struct Person)].score; offs > 0; offs--) {
temp[r * sizeof(struct Person)].trait = id[i * sizeof(struct Person)].trait;
temp[r * sizeof(struct Person)].score = 0;
r++;
}
}
n = kids;
id = realloc(id, kids * sizeof(struct Person));
assert(id != NULL);
for(i = 0; i < n; i++) {
id[i * sizeof(struct Person)].trait = temp[i * sizeof(struct Person)].trait;
id[i * sizeof(struct Person)].score = temp[i * sizeof(struct Person)].score;
}
printf("Done!");
free(randf);
free(randt);
free(temp);
free(id);
return 0;
}
答案 0 :(得分:4)
您使用
id [i * sizeof(struct Person)]
没有意义。
它应该是
id[i]