使用某些功能stdlib.h中或stdio.h中导致语法错误 [英] Using certain functions from stdlib.h or stdio.h causes syntax errors

问题描述

我工作在Visual Studio 2005中的一些C code对Win7的临64。在code是正确的;它编译和Eclipse下运行的MinGW的。但是，使用某些功能标准C库，例如标准输入输出或STDLIB导致以下线路时的code是建立在VS2005表现出语法错误。作为一个例子：

I'm working on some C code in Visual Studio 2005 on Win7 Pro x64. The code is correct; it compiles and runs on MinGW under Eclipse. However, using certain functions from the standard C libraries like stdio or stdlib causes the following lines to exhibit syntax errors when the code is built in VS2005. As an example:

#include<time.h>
#include<stdlib.h>
#include<stdio.h>
#include"someOtherHeader.h"

int main(void){
    srand((unsigned int) time(NULL));
    double start;
.
.
.

以下code无所谓。 VS2005说，有一个缺少;前类型。注释掉srand（）函数解决了这个问题。奇怪的是，当兰特（）是后来被称为，是没有问题的。我还注意到，退出（）和fprint（）的行为。但不是使用malloc（）。思考？

The following code doesn't matter. VS2005 says that there is a missing ';' before 'type'. Commenting out srand() fixes the problem. Oddly, when rand() is called later, there is no problem. I also noticed the behavior with exit() and fprint(). But not with malloc(). Thoughts?

推荐答案

在Visual Studio中使用C却将编译成严格的（老同学C）模式。您的所有声明都在你块的开头：

Using C in Visual Studio puts the compiler into strict (old school C) mode. All your declarations have to be at the beginning of your blocks:

#include<time.h>
#include<stdlib.h>
#include<stdio.h>
#include"someOtherHeader.h"

int main(void){
    double start;
    srand((unsigned int) time(NULL));
    .
    .
}

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