调用函数返回值出错了！怎么办？ - C语言论坛

已结贴√ 问题点数：20 回复次数：6

调用函数返回值出错了！怎么办？

#include <stdio.h>

      void panduan(int year,int month,int day);

    int main ()
    {
                printf("---------输入年月日，计算星期几！---------\n\n\n");
        while(1)
        {
            while(1)
            {
                int year,month,day;
                int y,m,d,c,s,w;
                int i=0;
                printf("请输入年月日（示例：2016 3 15）：");
                scanf("%d %d %d",&year,&month,&day);
                printf("\n");

                y=year;m=month;d=day;

                if(panduan(y,m,d))
                {
                    printf("日期不存在！请重新输入！\n\n");break;
                 }



                if (m==1) c=d;
                else if (m==2) c=31+d;
                else if (m==3) c=31+28+d;
                else if (m==4) c=31+28+31+d;
                else if (m==5) c=31+28+31+30+d;
                else if (m==6) c=31+28+31+30+31+d;
                else if (m==7) c=31+28+31+30+31+30+d;
                else if (m==8) c=31+28+31+30+31+30+31+d;
                else if (m==9) c=31+28+31+30+31+30+31+31+d;
                else if (m==10) c=31+28+31+30+31+30+31+31+30+d;
                else if (m==11) c=31+28+31+30+31+30+31+31+30+31+d;
                else if (m==12) c=31+28+31+30+31+30+31+31+30+31+30+d;

                if (m>2)
                {if (y%100==0) {if (y%400==0) c=c+1;}
                else if (y%4==0) c=c+1;}
                s=(y-1)*365+(y-1)/4-(y-1)/100+(y-1)/400+c;
                w=s%7;

                printf("\n");
                switch (w)
                {
                case 0: printf("           %d年%d月%d日是星期日\n",year,month,day);break;
                case 1: printf("           %d年%d月%d日是星期一\n",year,month,day);break;
                case 2: printf("           %d年%d月%d日是星期二\n",year,month,day);break;
                case 3: printf("           %d年%d月%d日是星期三\n",year,month,day);break;
                case 4: printf("           %d年%d月%d日是星期四\n",year,month,day);break;
                case 5: printf("           %d年%d月%d日是星期五\n",year,month,day);break;
                case 6: printf("           %d年%d月%d日是星期六\n",year,month,day);break;

                }
                printf("\n\n");
            }
        }

        return 0;
    }

    void panduan(int year,int month,int day)
    {
        int i;
        if(year<=0)
        {
            i=1;
        }

        if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
        {
            if(day<=0||day>31)
            {
                i=1;
            }
        }else if(month==4||month==6||month==9||month==11)
        {
            if(day<=0||day>30)
            {
                i=1;
            }
        }else if(month==2)
        {
            if(day%4==0&&day%100!=0)
            {
                if(day<=0||day>29)
                {
                    i=1;
                }
            }else
            {
                if(day<=0||day>28)
                {
                    i=1;
                }
            }

        }else
        {
            i=1;
        }
        return i;

    }

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第 2 楼

得分:5

  int panduan(int year,int month,int day)  //void???
    {
        int i=0; //???
        if(year<=0)
        {
            i=1;
        }

        if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
        {
            if(day<=0||day>31)
            {
                i=1;
            }
        }else if(month==4||month==6||month==9||month==11)
        {
            if(day<=0||day>30)
            {
                i=1;
            }
        }else if(month==2)
        {
            if(year%400==0||(year%4==0&&year%10!=0))  //year
            {
                if(day<=0||day>29)
                {
                    i=1;
                }
            }else
            {
                if(day<=0||day>28)
                {
                    i=1;
                }
            }

        }else
        {
            i=1;
        }
        return i;
    }

唯实惟新至诚致志

第 3 楼

得分:5

回复楼主落翼天玑乱

把函数void返回类型改成int试试

第 4 楼

得分:0

回复楼主落翼天玑乱

改了就行了，编译通过

#include <stdio.h>

      int panduan(int year,int month,int day);

    int main ()
    {
                printf("---------输入年月日，计算星期几！---------\n\n\n");
        while(1)
        {
            while(1)
            {
                int year,month,day;
                int y,m,d,c,s,w;
                int i=0;
                printf("请输入年月日（示例：2016 3 15）：");
                scanf("%d %d %d",&year,&month,&day);
                printf("\n");

                y=year;m=month;d=day;

                if(panduan(y,m,d))
                {
                    printf("日期不存在！请重新输入！\n\n");break;
                 }

                if (m==1) c=d;
                else if (m==2) c=31+d;
                else if (m==3) c=31+28+d;
                else if (m==4) c=31+28+31+d;
                else if (m==5) c=31+28+31+30+d;
                else if (m==6) c=31+28+31+30+31+d;
                else if (m==7) c=31+28+31+30+31+30+d;
                else if (m==8) c=31+28+31+30+31+30+31+d;
                else if (m==9) c=31+28+31+30+31+30+31+31+d;
                else if (m==10) c=31+28+31+30+31+30+31+31+30+d;
                else if (m==11) c=31+28+31+30+31+30+31+31+30+31+d;
                else if (m==12) c=31+28+31+30+31+30+31+31+30+31+30+d;

                if (m>2)
                {if (y%100==0) {if (y%400==0) c=c+1;}
                else if (y%4==0) c=c+1;}
                s=(y-1)*365+(y-1)/4-(y-1)/100+(y-1)/400+c;
                w=s%7;

                printf("\n");
                switch (w)
                {
                case 0: printf("           %d年%d月%d日是星期日\n",year,month,day);break;
                case 1: printf("           %d年%d月%d日是星期一\n",year,month,day);break;
                case 2: printf("           %d年%d月%d日是星期二\n",year,month,day);break;
                case 3: printf("           %d年%d月%d日是星期三\n",year,month,day);break;
                case 4: printf("           %d年%d月%d日是星期四\n",year,month,day);break;
                case 5: printf("           %d年%d月%d日是星期五\n",year,month,day);break;
                case 6: printf("           %d年%d月%d日是星期六\n",year,month,day);break;

                }
                printf("\n\n");
            }
        }

        return 0;
    }

    int panduan(int year,int month,int day)
    {
        int i;
        if(year<=0)
        {
            i=1;
        }

        if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
        {
            if(day<=0||day>31)
            {
                i=1;
            }
        }else if(month==4||month==6||month==9||month==11)
        {
            if(day<=0||day>30)
            {
                i=1;
            }
        }else if(month==2)
        {
            if(day%4==0&&day%100!=0)
            {
                if(day<=0||day>29)
                {
                    i=1;
                }
            }else
            {
                if(day<=0||day>28)
                {
                    i=1;
                }
            }

        }else
        {
            i=1;
        }
        return i;

    }

第 5 楼

得分:0

除了逻辑上的问题，main里面的两个while不是死循环？

唯实惟新至诚致志

第 6 楼

得分:5

你这题大概是输入几年几月几日然后输出是几天吧你可是定义个数组s[12]={31,28,31,30,31,30,31,31,30,31,30,31};还有闰年的s[12]={31,29,31,30,31,30,31,31,30,31,30,31}; 先判断是否为闰年然后几月把数组的几月前的天全部加起来然后再加上当天的那就是总共的天数若是星期几的话那就是取余了

第 7 楼

得分:5

程序代码：

//代码里有三个问题，
//第一个：void panduan(int year,int month,int day);   把void改为int；
//第二个：while 存在死循环，去除最外围的while循环；
//第三个：void panduan(int year,int month,int day);中 i没有进行初始化，定义i的时候需要将i的值初始化为0；

#include <stdio.h>

      //void panduan(int year,int month,int day);
   int panduan(int year,int month,int day);
    int main ()
    {
                printf("---------输入年月日，计算星期几！---------\n\n\n");
       // while(1)     //死循环
         //   {

            while(1)
            {
                int year,month,day;
                int y,m,d,c,s,w;
                int i=0;
                printf("请输入年月日（示例：2016 3 15）：");
                scanf("%d %d %d",&year,&month,&day);
                printf("\n");
               
                y=year;m=month;d=day;
               
                if(panduan(y,m,d))
                {
                    printf("日期不存在！请重新输入！\n\n");break;
                 }
                
       
                
                if (m==1) c=d;
                else if (m==2) c=31+d;
                else if (m==3) c=31+28+d;
                else if (m==4) c=31+28+31+d;
                else if (m==5) c=31+28+31+30+d;
                else if (m==6) c=31+28+31+30+31+d;
                else if (m==7) c=31+28+31+30+31+30+d;
                else if (m==8) c=31+28+31+30+31+30+31+d;
                else if (m==9) c=31+28+31+30+31+30+31+31+d;
                else if (m==10) c=31+28+31+30+31+30+31+31+30+d;
                else if (m==11) c=31+28+31+30+31+30+31+31+30+31+d;
                else if (m==12) c=31+28+31+30+31+30+31+31+30+31+30+d;
               
                if (m>2)
                {if (y%100==0) {if (y%400==0) c=c+1;}
                else if (y%4==0) c=c+1;}
                s=(y-1)*365+(y-1)/4-(y-1)/100+(y-1)/400+c;
                w=s%7;
               
                printf("\n");
                switch (w)
                {
                case 0: printf("           %d年%d月%d日是星期日\n",year,month,day);break;
                case 1: printf("           %d年%d月%d日是星期一\n",year,month,day);break;
                case 2: printf("           %d年%d月%d日是星期二\n",year,month,day);break;
                case 3: printf("           %d年%d月%d日是星期三\n",year,month,day);break;
                case 4: printf("           %d年%d月%d日是星期四\n",year,month,day);break;
                case 5: printf("           %d年%d月%d日是星期五\n",year,month,day);break;
                case 6: printf("           %d年%d月%d日是星期六\n",year,month,day);break;
                   
                }
                printf("\n\n");
            }   
        //}
       
        return 0;
    }





    //void panduan(int year,int month,int day)
    int panduan(int year,int month,int day)
    {
        //int i;
        int i=0;  //i需要进行初始化
        if(year<=0)
        {
            i=1;
        }
       
        if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
        {
            if(day<=0||day>31)
            {
                i=1;
            }
        }else if(month==4||month==6||month==9||month==11)
        {
            if(day<=0||day>30)
            {
                i=1;
            }
        }else if(month==2)
        {
            if(day%4==0&&day%100!=0)
            {
                if(day<=0||day>29)
                {
                    i=1;
                }
            }else
            {
                if(day<=0||day>28)
                {
                    i=1;
                }
            }
           
        }else
        {
            i=1;
        }
        return i;
       
    }

我总结了一下~~~

仰望星空，看看有没有馅饼落下