#include <stdio.h>
void main()
{
int i,n,a,b,c,h,ef;
static int  no[50]={0},ao[50]={0},bo[50]={0},co[50]={0},hap[50]={0};
static float e[50]={0};
float v,w,x,y,z;
char g[1];
char end;

for(i=0;i<50;i++)
{
printf("번호?");scanf("%d",&n);
if(n==-1)break;
no[i]=n;
printf("과목1 ?");scanf("%d",&a);
ao[i]=a;
printf("과목2 ?");scanf("%d",&b);
bo[i]=b;
printf("과목3 ?");scanf("%d",&c);
co[i]=c;

hap[i]=ao[i]+bo[i]+co[i]; e[i]=hap[i]/3.;

if(e[i]>=90)
g[i]='A';
else if(e[i]>=80)
g[i]='B';
else if(e[i]>=70)
g[i]='C';
else if(e[i]>=60)
g[i]='D';
else
g[i]='F';
}
printf("\t성적처리프로그램B반");
printf("\n번호\t과목1\t과목2\t과목3\t 총점\t평균\t학점\n");

a=0;b=0;c=0;h=0;ef=0;

for(i=0;i<=no[i];i++)
{
printf("%2d %9d %7d %7d %7d %8.1f %6c\n",no[i],ao[i],bo[i],co[i],hap[i],e[i],g[i]);

a=a+ao[i]; b=b+bo[i]; c=c+co[i]; h=h+hap[i]; ef=ef+e[i];
}

v=(float)a/i; w=(float)b/i; x=(float)c/i; y=(float)h/i; z=(float)ef/i;
printf("--------------------------------------------------------------------------------%d");
printf("%4.1f %7.1f %7.1f %7.1f %8.1f",v,w,x,y,z);

{
printf("\n%s\n%s\n%s\n",
       "********", "  분포", "********");
for(i=0; i<=1; i++)
for(n=0; n<=i-1; n++)
printf("----------------------------------------------------------------------\n");
printf("%10s%10s%8s%-20s\n\n", "학점", "횟수", " ", "히스토그램");
printf("%26s%-45s%26s%-45s\n", " ",
       "          1     1     2     2", " ",
       "1    5    0     5     0     5");
printf("----------------------------------------------------------------------\n");
for (i=0; i<=1; i++){
printf("%10d%10d%8s",i, " ");{
}
for (h=0; h<=i; h++)
printf("*");
printf("\n");
}
printf("----------------------------------------------------------------------\n");
printf("가장 많은수의 학점은%d이며\n"
       "%d번만큼 나왔다.\n");
       }
        }

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