[c++]程序的内存划分理解

• 全局和静态数据区:用于存放全局变量和静态变量(全局变量和局部变量)


• 常量数据区:用于存放常量数据


• 代码区:用于存储代码


• 栈:用于局部变量和函数参数


• 堆:程序员申请(程序员控制的部分,new/delete

#include <stdio.h>

#include <stdlib.h>

int gGlobal=100; // global
int main(void){

        char *pLocalString1="LocalString1";

        const char *pLocalString2="LocalString2";

        static int nLocalStatic=100;
int nLocal=10;

        const int nLocalConst=20;
int *pNew = new int[5];

        char *pMalloc = (char*)malloc(1);
printf("global var            0x%x\n",&gGlobal);

        printf("static var            0x%x\n",&nLocalStatic);

        printf("\n");

        printf("local var1                    0x%x\n",&pLocalString1);

        printf("local var2(const)            0x%x\n",&pLocalString2);
printf("\n");
printf("pNew                     0x%x\n",pNew);

        printf("pMalloc             0x%x\n",pMalloc);
pLocalString1[1]=‘a‘;//error 字符常量,数据定义好后,不能在修改.该地址,在编译前已经确定好

        printf("\n");
printf("local point(pNew)                     0x%x\n",&pNew);

        printf("local point(pMalloc)              0x%x\n",&pMalloc);

        printf("local point(pLocalString1)                     0x%x\n",&pLocalString1);

        printf("local point(pLocalString2)                     0x%x\n",&pLocalString2);

        printf("local point(nLocalConst)                     0x%x\n",&nLocalConst);

        printf("local point(nLocal)                     0x%x\n",&nLocal);
}

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