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Preparation of the rank list of a class of students using pointers and two dimensional arrays

Posted By: Binge Fischer     Category: C Programming     Views: 11231

Write a program that prepares rank list of a class of students using pointers and two dimensional arrays.

Code for Preparation of the rank list of a class of students using pointers and two dimensional arrays in C Programming

#define  STUDENTS  5                                             
  #define  SUBJECTS  4                                             
  #include <string.h>                                              
                                                                    
  main()                                                           
  {                                                                
    char name[STUDENTS][20];                                     
    int  marks[STUDENTS][SUBJECTS+1];                    
                                                                    
    printf("Input students names & their marks in four subjects\n");
    get_list(name, marks, STUDENTS, SUBJECTS);                   
    get_sum(marks, STUDENTS, SUBJECTS+1);                        
    printf("\n");                                                
    print_list(name,marks,STUDENTS,SUBJECTS+1);                  
    get_rank_list(name, marks, STUDENTS, SUBJECTS+1);            
    printf("\nRanked List\n\n");                                 
    print_list(name,marks,STUDENTS,SUBJECTS+1);  
   }                                                                
/*   Input student name and marks        */
get_list(char *string[ ], int array [ ] [SUBJECTS +1], int m, int n) { int i, j, (*rowptr)[SUBJECTS+1] = array; for(i = 0; i < m; i++) { scanf("%s", string[i]); for(j = 0; j < SUBJECTS; j++) scanf("%d", &(*(rowptr + i))[j]); } } /* Compute total marks obtained by each student */
get_sum(int array [ ] [SUBJECTS +1], int m, int n) { int i, j, (*rowptr)[SUBJECTS+1] = array; for(i = 0; i < m; i++) { (*(rowptr + i))[n-1] = 0; for(j =0; j < n-1; j++) (*(rowptr + i))[n-1] += (*(rowptr + i))[j]; } } /* Prepare rank list based on total marks */
get_rank_list(char *string [ ], int array [ ] [SUBJECTS + 1] int m, int n) { int i, j, k, (*rowptr)[SUBJECTS+1] = array; char *temp; for(i = 1; i <= m-1; i++) for(j = 1; j <= m-i; j++) if( (*(rowptr + j-1))[n-1] < (*(rowptr + j))[n-1]) { swap_string(string[j-1], string[j]); for(k = 0; k < n; k++) swap_int(&(*(rowptr + j-1))[k],&(*(rowptr+j))[k]); } } /* Print out the ranked list */
print_list(char *string[ ], int array [] [SUBJECTS + 1], int m, int n) { int i, j, (*rowptr)[SUBJECTS+1] = array; for(i = 0; i < m; i++) { printf("%-20s", string[i]); for(j = 0; j < n; j++) printf("%5d", (*(rowptr + i))[j]); printf("\n"); } } /* Exchange of integer values */
swap_int(int *p, int *q) { int temp; temp = *p; *p = *q; *q = temp; } /* Exchange of strings */
swap_string(char s1[ ], char s2[ ]) { char swaparea[256]; int i; for(i = 0; i < 256; i++) swaparea[i] = '\0'; i = 0; while(s1[i] != '\0' && i < 256) { swaparea[i] = s1[i]; i++; } i = 0; while(s2[i] != '\0' && i < 256) { s1[i] = s2[i]; s1[++i] = '\0'; } i = 0; while(swaparea[i] != '\0') { s2[i] = swaparea[i]; s2[++i] = '\0'; } } Output Input students names & their marks in four subjects S.Laxmi 45 67 38 55 V.S.Rao 77 89 56 69 A.Gupta 66 78 98 45 S.Mani 86 72 0 25 R.Daniel 44 55 66 77 S.Laxmi 45 67 38 55 205 V.S.Rao 77 89 56 69 291 A.Gupta 66 78 98 45 287 S.Mani 86 72 0 25 183 R.Daniel 44 55 66 77 242 Ranked List V.S.Rao 77 89 56 69 291 A.Gupta 66 78 98 45 287 R.Daniel 44 55 66 77 242 S.Laxmi 45 67 38 55 205 S.Mani 86 72 0 25 183
  
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Binge Fischer
Binge Fischer author of Preparation of the rank list of a class of students using pointers and two dimensional arrays is from Frankfurt, Germany.
 
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