C++模拟进程状态的转化

最近在写操作系统的实验报告，顺带写篇博客~
题目：用C++编程来模拟 进程状态的转换
备注都在上面，一看就懂哈~

#include<stdio.h>#include<stdlib.h>#include<string.h>struct jincheng_type{    int pid;      //进程的ID    int youxian;  //进程的优先级    int daxiao;   //进程的大小    int zhuangtai;//进程的状态    char info[10];//新进程的内容};struct jincheng_type neicun[20];//内存容量，最大20个进程int shumu = 0, guaqi = 0, pid, flag = 0;/***********创建新的进程***********/void create(){    if(shumu >= 20) printf("\n内存已满，请先唤出或杀死进程\n");    else    {        int i;        for( i = 0; i < 20; i++)        {            if(neicun[i].zhuangtai == 0) break;        }        printf("\n请输入新进程pid\n");        scanf("%d", &(neicun[i].pid));        for(int j = 0; j < i; j++)            if(neicun[i].pid == neicun[j].pid)            {                printf("\n该进程已存在\n");                return;            }            printf("\n请输入进程优先级\n");            scanf("%d", &(neicun[i].youxian));            printf("\n请输入进程大小\n");            scanf("%d", &(neicun[i].daxiao));            printf("\n请输入新进程的内容\n");            scanf("%s", &(neicun[i].info));            neicun[i].zhuangtai = 1;            shumu++;    }}/***********查看运行进程***********/void run(){    for(int i = 0; i < 20; i++)    {        if(neicun[i].zhuangtai == 1)        {            printf("\n pid = %d", neicun[i].pid);            printf("youxian = %d",neicun[i].youxian);            printf("daxiao = %d",neicun[i].daxiao);            printf("zhuangtai = %d", neicun[i].zhuangtai);            printf("info = %s", neicun[i].info);            flag = 1;        }    }    if(!flag)    {        printf("\n当前没有运行进程\n");    }}/***********唤出某个进程***********/void huancun(){    if(!shumu)    {        printf("\n当前没有运行进程\n");        return ;    }    printf("\n输入唤出进程的ID值");    scanf("%d", &pid);    for(int i = 0; i < 20; i++)    {        if(pid == neicun[i].pid)        {            if(neicun[i].zhuangtai == 1)            {                neicun[i].zhuangtai = 2;                guaqi++;                printf("\n已成功唤出进程\n");            }            else                if(neicun[i].zhuangtai == 0)                    printf("\n要唤出的进程不存在\n");                else printf("\n要唤出的进程已被挂起\n");                flag = 1;                break;        }    }    if(flag == 0)        printf("\n要唤出的进程不存在\n");}/***********杀死运行进程***********/void kill(){    if(!shumu)    {        printf("\n当前没有运行进程\n");        return;    }    printf("\n输入杀死进程的ID值");    scanf("%d", &pid);    for(int i = 0; i < 20; i++)    {        if(pid == neicun[i].pid)        {            if(neicun[i].zhuangtai == 1)            {                neicun[i].zhuangtai = 0;                shumu --;                printf("\n已成功杀死进程\n");            }            else                if(neicun[i].zhuangtai == 0)                    printf("\n要杀死的进程不存在\n");                else                    printf("\n要杀死的进程已被挂起\n");            flag = 1;            break;        }    }    if(!flag)        printf("\n要杀死的进程不存在\n");}/***********唤醒某个进程***********/void huanxing(){    if(!shumu)    {        printf("\n当前没有运行进程\n");        return;    }    printf("\n输入pid\n");    scanf("%d", &pid);    for(int i = 0; i < 20; i++)    {        if(pid == neicun[i].pid)        {            flag = false;            if(neicun[i].zhuangtai == 2)            {                neicun[i].zhuangtai = 1;                guaqi --;                printf("\n已成功唤醒进程\n");            }            else                if(neicun[i].zhuangtai == 0)                    printf("\n要唤醒的进程不存在\n");                else printf("\n要唤醒的进程已被挂起\n");                break;        }    }    if(flag)printf("\n要唤醒的进程不存在\n");}int main(){    int n = 1;    int num;    for(int i = 0; i < 20; i++)        neicun[i].zhuangtai = 0;    while(n)    {        printf("\n*********************************************************\n");        printf("\n                        进程演示系统                     \n");        printf("\n           1创建新的进程                    2查看运行进程\n");        printf("\n           3唤出某个进程                    4杀死运行进程\n");        printf("\n           5唤醒某个进程                    6退出系统    \n");        printf("\n*********************************************************\n");        printf("\n请选择（1~6）\n");        scanf("%d", &num);        switch(num)        {            case 1 : create(); break;            case 2 : run(); break;            case 3 : huancun(); break;            case 4 : kill(); break;            case 5 : huanxing(); break;            case 6 : exit(0);            default: n = 0;        }        flag = 0;    }}

运行结果就是这样，之后我们再来对其进行各种操作，请自行尝试，这里不做过多介绍~