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42
notes.txt
42
notes.txt
@ -1,42 +0,0 @@
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notes Léo Rocher
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./student_rank 5 5 1
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gprof ./student_rank
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-b pour enlever les explications
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% cumulative self self total
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time seconds seconds calls Ts/call Ts/call name
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0.00 0.00 0.00 30 0.00 0.00 bubblesort
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0.00 0.00 0.00 25 0.00 0.00 find_rank_student
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0.00 0.00 0.00 10 0.00 0.00 print_array
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0.00 0.00 0.00 5 0.00 0.00 generate_array
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0.00 0.00 0.00 2 0.00 0.00 free_array
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0.00 0.00 0.00 2 0.00 0.00 print_student_array
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0.00 0.00 0.00 1 0.00 0.00 generate_grades
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0.00 0.00 0.00 1 0.00 0.00 generate_ranks
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0.00 0.00 0.00 1 0.00 0.00 sort_students
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./student_rank 1000 1000 0
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% cumulative self self total
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time seconds seconds calls s/call s/call name
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81.50 2.27 2.27 1001000 0.00 0.00 bubblesort
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18.31 2.78 0.51 1000000 0.00 0.00 find_rank_student
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0.36 2.79 0.01 1 0.01 2.79 sort_students
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0.00 2.79 0.00 1000 0.00 0.00 generate_array
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0.00 2.79 0.00 2 0.00 0.00 free_array
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0.00 2.79 0.00 1 0.00 0.00 generate_grades
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0.00 2.79 0.00 1 0.00 0.00 generate_ranks
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time ./student_rank 1000 1000 0
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real 0m2.844s
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user 0m2.818s
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sys 0m0.007s
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trop d'appel à bubblesort, il y a un appel à la fonction en trop l.58 dans la fonction find rank de student_rank.c.
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--> gain de temps
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BIN
student_rank
BIN
student_rank
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@ -55,7 +55,7 @@ int find_rank_student(int student_grade, int* grades_array, int students_number)
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{
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int position = -1;
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int i = 0;
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// bubblesort(grades_array,students_number); en trop
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bubblesort(grades_array,students_number);
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for(i = students_number-1; i >= 0; i--)
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{
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if(grades_array[i] == student_grade)
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