值计数指针是不会改变

Question

我传递计数指针所有的功能，但它的价值不会改变，并保持0

int binarysearch(int a[],int l,int r,int k,int *count) 
{ 

    int m = (r+l)/2; 
    if (r > l) 
    { 
     if (a[m] > k){ 
      *count++; 
     return binarysearch(a,l,m-1,k,count); 
     } 
     if (a[m] < k) 
     { 
      *count++; 
      return binarysearch(a,m+1,r,k,count); 
     } 
     if (a[m] == k) 
     { 
      *count++; 
      return m; 
     } 
    } 
    if (r <= l) 
    { 
     *count++; 
     if (k>a[l]) return l+1; 
     else return l; 
    } 

} 


void insertati (int a[],int i,int *count) 
{ 

    int t = binarysearch(a,0,i-1,a[i],count); 
    int y = a[i],j = i-1; 
    while (j >= t) 
     { 
      a[j+1] = a[j]; 
      j--; 
     } 
    a[j+1] = y; 
} 

void insetionsort(int a[],int n,int *count) 
{ 

    for (int i = 1; i < n; ++i) 
    { 
     insertati(a,i,count); 
    } 
} 

int main() 
{ 

    int n,count =0; 
    scanf("%d",&n); 
    int arr[n]; 
    for (int i = 0; i <n; ++i) 
    { 
     scanf("%d",&arr[i]); 
    } 
    insetionsort(arr,n,&count); 
    printf("%d\n",count); 
    for (int i = 0; i <n; ++i) 
    { 
     printf("%d ",arr[i]); 
    } 


    return 0; 
} 

Answer 1

环绕带括号解引用：

int binarysearch(int a[],int l,int r,int k,int *count) { 
    int m = (r+l)/2; 
    if (r > l) 
    { 
     if (a[m] > k){ 
      (*count)++; 
     return binarysearch(a,l,m-1,k,count); 
     } 
     if (a[m] < k) 
     { 
      (*count)++; 
      return binarysearch(a,m+1,r,k,count); 
     } 
     if (a[m] == k) 
     { 
      (*count)++; 
      return m; 
     } 
    } 
    if (r <= l) 
    { 
     (*count)++; 
     if (k>a[l]) return l+1; 
     else return l; 
    } 
}