对于我必须要做的项目,我必须列出一组课程,让用户选择要使用的课程,并为学期打印每周课程。 (与我提出的第一个问题相同的程序。)然而,当我尝试打印每周时间表时,我似乎遇到了问题。 (该计划相当冗长,至少根据我在C中的经验。)
struct course
{
int index;
char name[7];
char day[4];
int hours,houre,mins,mine;
char ap[3];
int credit;
};
struct course whcl[]={ {0,"MATH1","MWF",7,8,30,50,"AM",5},
{1,"MATH2","MWF",9,10,00,20,"AM",5},
{2,"CHEM1","MW ",2,6,30,50,"PM",5},
{3,"PHYS4","TTH",4,6,00,45,"PM",4},
{4,"ENGR1","M ",9,10,30,20,"AM",1},
{5,"ENGR2","TTH",10,12,00,15,"PM",3},
{6,"ENGR3","MW ",11,12,00,15,"PM",3}};
int choice[15],i,j,k,num,z,s;
void printout(int z); //(To be put in when I fix the function)
int main(void)
{
char l[8][3]={{"st"},{"nd"},{"rd"},{"th"},{"th"},{"th"},{"th"},{"th"}};
printf(" Fall Schedule\n");
printf("Index Course Day Time Credit\n");
printf("-------------------------------------------\n");
for(i=0;i<7;i++)
{
printf(" %i %s %s %i%i:%i%i-%i%i:%i%i%s %i\n",
whcl[i].index,whcl[i].name,whcl[i].day,
whcl[i].hours/10,whcl[i].hours%10,
whcl[i].mins/10,whcl[i].mins%10,
whcl[i].houre/10,whcl[i].houre%10,
whcl[i].mine/10,whcl[i].mine%10,
whcl[i].ap,whcl[i].credit);
}
printf("How many classes would you like to take?: ");
scanf("%i",&num);
for(i=0;i<num;i++)
{
printf("Select the %i%s class using the index: ",i+1,l[i]);
scanf("%i",&choice[i]);
}
printf("The classes you have selected are:\n");
printf("Index Course Day Time Credit\n");
printf("-------------------------------------------\n");
for(i=0;i<num;i++)
{
s=choice[i];
printf(" %i %s %s %i%i:%i%i-%i%i:%i%i%s %i\n",
whcl[s].index,whcl[s].name,whcl[s].day,
whcl[s].hours/10,whcl[s].hours%10,
whcl[s].mins/10,whcl[s].mins%10,
whcl[s].houre/10,whcl[s].houre%10,
whcl[s].mine/10,whcl[s].mine%10,
whcl[s].ap,whcl[s].credit);
}
printf("Your weekly schedule for Fall is:\n");
printf(" Time Monday Tuesday Wednesday Thursday Friday\n");
printout(z);
return 0;
}
void printout(int z)
{
int start,starti,end,endi,num;
int slot[25][6];
for(i=0;i<24;i++)
for(j=0;j<5;j++)
slot[i][j]=99;
for(i=0;i<num;i++)
{
if ((whcl[choice[i]].day)=="MWF")//I think the problem is here.
{
start=whcl[choice[i]].hours*60+whcl[choice[i]].mins;
end=whcl[choice[i]].houre*60+whcl[choice[i]].mine;
starti=(start-450)/30;
endi=(end-450)/30;
for(j=starti;j<=endi;j++)
slot[j][1]=slot[j][3]=slot[j][6]=whcl[choice[i]].index;
}
}
for(i=0;i<24;i++)
{
printf("%i%i:%i%i-%i%i:%i%i ",
(450+(i-1)*30)/60/10,(450+(i-1)*30)/60%10,
(450+(i-1)*30)%60/10,(450+(i-1)*30)%60%10,
(450+(i-1)*30+30)/60/10,(450+(i-1)*30+30)/60%10,
(450+(i-1)*30+30)%60/10,(450+(i-1)*30+30)%60%10);
for(j=0;j<4;j++)
{
if (slot[i][j]!=99) //Use Note here
printf(" %s ",whcl[choice[i]].name);
else
printf("");
}
printf("\n");
}
return;
}
当我打印出时间表时,唯一出现的就是时间。其他一切都是空白的。我认为这是由于我试图用99以外的东西替换插槽阵列。如果你打算运行这个程序,请使用2你想要的类数量,并在类选择上使用0和1作为索引。 (我没有任何if语句,也没有考虑用户可能选择的其他类。)这是我正在尝试为我的程序做的照片。 http://postimg.org/image/3tlgtwu9h/我用油漆把时间表放在方框中,以便在编码时直观地看到不同的数组。
注意:如果你将if语句更改为[i] [j] == 99你可以看到桌子上印有“Class”,但是它填满了整个数组插槽,这证实了我的想法,我搞砸了试图替换数组中的数据。另外,我用99填充它以使99与空格相关联。
答案 0 :(得分:0)
if ((whcl[choice[i]].day)=="MWF")
//我认为问题就在这里。
正确,您需要使用strcmp
来比较字符串,而不是==
尝试:
if (strcmp(whcl[choice[i]].day,"MWF") == 0)
等于==
将检查指针是否相同,以便您可以:
char * a = "MTW"; char *b = a
然后a == b
将是真的