Correct Answer: #include "stringh" #include "stdlibh" struct stud { int rollno; int marks; char name[30]; }; int sort_m (struct stud *, struct stud *); int sort_name (struct stud *, struct stud *); int sort_marks (struct stud *, struct stud *); main() { static struct stud ss[] = { { 15, 96, "Akshay" }, { 2, 97, "Madhuri" }, { 8, 85, "Aishvarya" }, { 10, 80, "Sushmita" } }; int x,w; clrscr(); w = sizeof (struct stud); printf ('\nIn order of roll numbers:"); qsort (ss, 4, w, sort_rn); for(x=0; x<4;x++) printf ("\n%d%s%d", ss[x]rollno, ss[x]name,ss[x]marks); printf("\n\nIn order of names:"); qsort(ss, 4, sort_name); for (x=0; x<4;x++) printf("\n%d%s%d",ss[x]rollno, ss[x]name,ss[x]marks); printf("\n\nIn order of marks:"); qsort(ss,4,w,sort_marks); for (x=0;x<4;x++) printf ("\n%d%s%d",ss[x]rollno,ss[x]name,ss[x]marks); } int sort_rn (struct stud *t1, struct stud *t2) { return (t1->rollno-t2->rollno); } int sort_name (struct stud *t1, struct stud *t2) { return (strcmp(t1->name,t2->name)); } int sort_marks (struct stud *t1, struct stud *t2) { return (t2->marks-t1->marks); }
