学生成绩管理系统V2.0

#include #include #include int main() int a,b,d,e,n,z; float c=0,g; printf(Input student number(n30):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=89,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 numbern 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 students ID and score:n); for (b=0;bn;b+) scanf(%ld%f,&vb,&vcb); break; case 2: for (b=0;bn;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;dn;d+) for (e=d+1;en;e+) if (vcdvce) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;bn;b+) printf(%ldt%.0fn,vb,vcb); break; case 4: printf(Sort in ascending order by score:n); for (d=0;dn;d+) for (e=d+1;evce) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;bn;b+) printf(%ldt%.0fn,vb,vcb); break; case 5: printf(Sort in ascending order by number:n); for (d=0;dn;d+) for (e=d+1;eve) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;bn;b+) printf(%ldt%.0fn,vb,vcb); break; case 6: printf(Input the number you want to search:n); scanf(%ld,&f); z=0; for (b=0;bn;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;bn;b+) if (vcb60) x1+; else if (vcb70) x2+; else if (vcb80) x3+; else if (vcb90) x4+; else if (vcb100) x5+; else 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;dn;d+) for (e=d+1;eve) g=vcd; vcd=vce; vce=g; g=vd; vd=ve; ve=g; for (b=0;bn;b+) printf(%ldt%.0fn,vb,