小编use*_*789的帖子

我正在使用此函数将数据表导出到excel中.

  protected void ExportExcel(System.Data.DataTable dt) 
    { 
         if (dt == null||dt.Rows.Count==0) return; 
         Microsoft.Office.Interop.Excel.Application xlApp = 
new Microsoft.Office.Interop.Excel.Application(); 

 if (xlApp == null) 
 { 
     return; 
 } 
 System.Globalization.CultureInfo CurrentCI = 
System.Threading.Thread.CurrentThread.CurrentCulture; 
 System.Threading.Thread.CurrentThread.CurrentCulture = 
    new System.Globalization.CultureInfo("en-US"); 
 Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks; 
 Microsoft.Office.Interop.Excel.Workbook workbook = 
 workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); 
 Microsoft.Office.Interop.Excel.Worksheet worksheet = 
(Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; 
 Microsoft.Office.Interop.Excel.Range range; 
 long totalCount = dt.Rows.Count; 
 long rowRead = 0; 
 float percent = 0; 
 for (int i = 0; i < dt.Columns.Count; i++) 
 { 
     worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName; 
     range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]; 
     range.Interior.ColorIndex …

我对Objective-C比较新,我知道它是C的超集.但是当我尝试在GCC中编译这个C代码时,它给了我一个错误,我无法执行代码.

  #include <stdio.h>  
  int main(){  
   int x;
   printf("Input int:\n");
   scanf("%d", x);
   printf("%d", x);
    return 0;             
}

当我执行其他代码时,没有错误,但输出错误.注意:唯一的变化是"int*x".

   #include <stdio.h>  
   int main(){  
   int *x;
   printf("Input int:\n");
   scanf("%d", x);
   printf("%d", x);
    return 0;             
}

  INPUT: 3
  OUTPUT: 2147307520