c语言编一个学生成绩统计程序

#include

<stdio.h>

void

main()

{

int

i,

n,

reno

float

score[30],

avr,

a,

b,

c

char

name[30][9]

for(i

=

0

i

<

30

i++)

{

printf("%d号的成绩：",

i+1)

scanf("%f",

&score[i])

if(score[i]

<

0)

break

printf("%d号的姓名：",

i+1)

scanf("%s",

name[i])

}

n

=

i

printf("统计不及格人数:\n")

reno

=

0

avr

=

0

for(i

=

0

i

<

n

i++)

{

if(

score[i]

<

60)

{

reno++

printf("%d,

%s\n",

i+1,

name[i])

}

avr

+=

score[i]

}

printf("不及格人数为%d\n\n",

reno)

printf("统计成绩在平均分及平均分之上的学生人数:\n")

avr

/=

nreno

=

0

for(i

=

0

i

<

n

i++)

{

if(score[i]

>=

avr)

{

reno++

printf("%d,

%s\n",

i+1,

name[i])

}

}

printf("成绩在平均分及平均分之上的学生人数为%d\n\n",

reno)

printf("统计各分数段的人数及所占百分比（分数段为<60,60~79,>=80）:\n")

a

=

b

=

c

=0

for(i

=

0

i

<

n

i++)

{

if(score[i]

<

60)

a++

else

if(score[i]

>=

80)

c++

else

b++

}

printf("<60:\t%.1f%%\n60~79:\t%.1f%%\n>=80:\t%.1f%%\n",100*a/n,100*b/n,100*c/n)

}

int chengji[100],t2

char xingming[100][8],t1[8]

int i,j,n

printf("输入学生个数:\n')

scanf("%d",&n)

for(i=0i<ni++)

{

printf("输入第%d个学生姓名:",i+1)

scanf("%s",&xingming[i])

printf("成绩:")

scanf("%d"&chengji[i])

}

for(i=0i<ni++)

for(j=i+1j<nj++)

{

if(chengji[i]<chengji[j])

{

t2=chengji[i]

chengji[i]=chengji[j]

chengji[j]=t2

strcpy(t1, xingming[i])

strcpy(xingming[i], xingming[j])

strcpy(xingming[j], t1)

}

}

j=n*8/10

for(i=0i<ni++)

{

printf("序号 姓名 成绩 是否通过\n")

printf("%d %c %d",i+1,xingming[i],chengji[i])

if(i<=j)

printf("pass\n")

else

printf("fail\n")

}

---