我的代码运行良好,并给出正确的结果多达3次迭代。但是,我经过3次迭代得到一个分段错误,当我试图运行下面的代码:尝试使用C中的realloc扩展数组时遇到了分段错误错误
int addNode(double* distNewNode,int placeCount, int* phi,double* lambda)
{
int i ;
int nextPlaceCount = placeCount+1;
//int nodeCount = placeCount -1;
phi= realloc(phi,nextPlaceCount*sizeof(int));
lambda = realloc(lambda,nextPlaceCount*sizeof(double)); //This line throws the error
phi[placeCount] = placeCount;
lambda[placeCount] = DBL_MAX;
for (i = 0;i < placeCount; i++)
if (lambda[i] >= distNewNode[i])
{
if (lambda[i] <= distNewNode[phi[i]])
distNewNode[phi[i]] = lambda[i];
lambda[i] = distNewNode[i];
phi[i] = placeCount;
}
else if (distNewNode[i] < distNewNode[phi[i]])
distNewNode[phi[i]] = distNewNode[i];
for (i = 0;i < placeCount;i++)
if(lambda[i] >= lambda[phi[i]])
phi[i] = placeCount;
return 1;
}
这里是我叫ADDNODE()函数:
int main()
{
//Create distMat here
int* phi;
phi = (int*)malloc(1);
phi[0] = 1;
//phi[1] = 1;
double* lambda;
lambda = (double*)malloc(1);
//lambda[0] = 1.2;
lambda[0] = DBL_MAX;
int isNodeAdded;
for (int placeCount=0; placeCount < 10;placeCount++)
{
double* temp =(double*) malloc(placeCount);
for (int j= 0;j < placeCount ;j++)
{
temp[j] = distMat[placeCount][j];
}
isNodeAdded = addNode(temp,placeCount,phi,lambda);
cout << "isNodeAdded: "<<isNodeAdded << endl;
free(temp);
for (int i=0;i < placeCount ;i++)
{
printf("Node= %d Pi = %d Lambda = %f \n",i,phi[i],lambda[i]);
}
}
}
我的输出是:
isNodeAdded: 1
isNodeAdded: 1
Node= 0 Pi = 1 Lambda = 1.200000
isNodeAdded: 1
Node= 0 Pi = 1 Lambda = 1.200000
Node= 1 Pi = 2 Lambda = 3.400000
isNodeAdded: 1
The program has unexpectedly finished.
这不是C!并且请参阅[问] – Olaf
主要功能是C++,但addNode()函数是C. – Bhoke
除非你用C编译器编译它,它不是!阅读我提供的链接!并检查关键功能的结果! – Olaf