學(xué)生成績(jī)管理系統(tǒng)V2.09頁

1、#include <stdio.h>#include <stdlib.h>#include <string.h>int main() int a,b,d,e,n,z; float c=0,g; printf("Input student number(n<30):n"); scanf("%d",&n); long vn,f; float vcn; next:; int x1=0,x2=0,x3=0,x4=0,x5=0,x6=0; int z1=60,z2=69,z3=70,z4=79,z5=80,z6=8

2、9,z7=90,z8=99,z9=100; printf("Management for Students' scoresn" "1.Input recordn" "2.Caculate total and average score of coursen" "3.Sort in descending order by scoren" "4.Sort in ascending order by scoren" "5.Sort in ascending order by numb

3、ern" "6.Search by numbern" "7.Statistic analysisn" "8.List recordn" "0.Exitn" "Please Input your choice:n"); scanf("%d",&a); switch (a) case 1: printf("Input student's ID and score:n"); for (b=0;b<n;b+) scanf("

4、;%ld%f",&vb,&vcb); break; case 2: for (b=0;b<n;b+) c=c+vcb; printf("sum=%.0f,aver=%.2fn",c,c/n); break; case 3: printf("Sort in descending order by score:n"); for (d=0;d<n;d+) for (e=d+1;e<n;e+) if (vcd<vce) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (

5、b=0;b<n;b+) printf("%ldt%.0fn",vb,vcb); break; case 4: printf("Sort in ascending order by score:n"); for (d=0;d<n;d+) for (e=d+1;e<n;e+) if (vcd>vce) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;b<n;b+) printf("%ldt%.0fn",vb,vcb); break; case 5: pri

6、ntf("Sort in ascending order by number:n"); for (d=0;d<n;d+) for (e=d+1;e<n;e+) if (vd>ve) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;b<n;b+) printf("%ldt%.0fn",vb,vcb); break; case 6: printf("Input the number you want to search:n"); scanf("%ld&

7、quot;,&f); z=0; for (b=0;b<n;b+) if (vb=f) printf("%ldt%.0fn",vb,vcb); z=1; break; if (z=0) printf("Not found!n"); break; case 7: for (b=0;b<n;b+) if (vcb<60) x1+; else if (vcb<70) x2+; else if (vcb<80) x3+; else if (vcb<90) x4+; else if (vcb<100) x5+; el

8、se x6+; printf("<60t%dt%.2f%n",x1,(float)x1/n*100); printf("%d-%dt%dt%.2f%n",z1,z2,x2,(float)x2/n*100); printf("%d-%dt%dt%.2f%n",z3,z4,x3,(float)x3/n*100); printf("%d-%dt%dt%.2f%n",z5,z6,x4,(float)x4/n*100); printf("%d-%dt%dt%.2f%n",z7,z8,x5,(float)x5/n*100); printf("%dt%dt%.2f%n",z9,x6,(float)x6/n*100); break; case 8: for (d=0;d<n;d+) for (e=d+1;e<n;e+) if (vd>ve) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;b<n;b+) printf("%ldt%.0fn&