Using arrays, files and strings: Reading grades from a file and processing the data: 1. Ask the user for the name of the file containing grades. 2. Call the function to read the file. 3. Call the function to find the topper of the class. 4. Call the function to find the average grade of the class. 5. Print the points obtained by the topper and the class average. #include <stdio.h> #define SIZE 10 void readfile(char filename[], int grade[], int n); double perform ( int grade[], int n); int topper ( int A[ ], int nn); int main(void) { int grade[SIZE],topper_position; double av; char filename[30]; printf("\nenter the name of the file.\n"); scanf("%s",filename); readfile(filename, grade,SIZE); topper_position = topper( grade , SIZE); av = perform( grade, SIZE); printf("\ntopper got %d points.", grade[topper_position]); printf("\nclass average is %.2f points.",av); return 0; } void readfile(char filename[], int grade[], int n) { int size, i; FILE *ifp; ifp = fopen(filename, "r"); for (i=0; i< n; i++) fscanf(ifp, "%d", &grade[i] ); fclose(ifp); } double perform ( int grade[], int n) { int total= 0, i; double average; for (i=0; i < n; i++)total = total+ grade[i]; average = total/10.0; return average; } int topper ( int A[ ], int nn) { int i, max_pos; max_pos = nn-1; for (i=0; i < nn-1; i++) if ( A[i]> A[max_pos] ) max_pos = i; return max_pos; } Exam.txt 30 40 40 50 50 60 60 90 70 60 topper got 90 points. class average is 55.00 points.Reading names of students and their grades from a file and processing the data: 1. Ask the user for the name of the file containing grades. 2. Call the function to read the name of each student and corresponding grade. 3. Call the function to find the position of the topper of the class. 4. Call the function to find the average grade of the class. 5. Call the print function to print the names of the students and points obtained by them, and the name of the topper and the points obtained. #include <stdio.h> #define SIZE 10 void readfile(char filename[], char student[][30], int grade[], int n); int topper ( int A[ ], int nn); void printing (char student[][30],grade[],int n, int top_pos) int main(void) { int grade[SIZE],topper_position, i; double av; char filename[30], student[SIZE][30]; printf("\nenter the name of the file.\n"); scanf("%s",filename); readfile(filename, student, grade,SIZE); topper_position = topper( grade , SIZE); av = perform( grade, SIZE); printing (student, grade, SIZE, top_pos); return 0; } void readfile(char filename[], char student[][30], int grade[], int n) { int size, i; FILE *ifp; ifp = fopen(filename, "r"); for (i=0; i< n; i++) { fscanf(ifp, "%s", student[i] ); fscanf(ifp, "%d", &grade[i] ); } fclose(ifp); }void printing (char student[][30],grade[],int n, int top_pos) { int i; for (i=0; i< n; i++) printf("\n%s \t %d", student[i] , grade[i] ); printf("\n%s is the topper and he got %d points.", student [top_pos],grade[top_pos]); printf("\nclass average is %.2f points.",av); } Examdata.txt Sonya 30 David 40 Denise 40 Julie 50 Ashley 50 Ron 60 Stanley 60 Kegan 90 Sam 70 John 60 Sonya 30 David 40 Denise 40 Julie 50 Ashley 50 Ron 60 Stanley 60 Kegan 90 Sam 70 John 60 Kegan is the topper and he got 90 points. class average is 55.00 points.Reading names of students and to enquire about the grade of a specific student. 1. Ask the user for the name of the file containing grades. 2. Call the function to read the name of each student and corresponding grade. 3. Ask the user for the name of the student whose grade is needed. 4. If the name is found, print the grade, else print “nobody by that name”. #include <stdio.h> #define SIZE 10 void readfile(char filename[], char student[][30], int grade[], int n); int find( char student[][30], char name[], int n); int main(void) { int grade[SIZE],topper_position, i, newpos; double av; char filename[30], newname[30], student[SIZE][30]; printf("\nenter the name of the file.\n"); scanf("%s",filename); readfile(filename, student, grade,SIZE); for (i=0; i< SIZE; i++) printf("\n%s \t %d", student[i] , grade[i] ); printf("\nwhose grade do you want?\n"); scanf("%s",newname); newpos = find(student, newname,SIZE); if ( newpos == -1) printf("\n There is no student by this name.”); else printf("\n%s has got %d points.", newname, grade[newpos]); return 0; } int find( char student[][30], char name[], int n) { int i; for (i=0; i < n; i++) if(strcmp(name,student[i])==0) return i; return -1; }Sonya 30 David 40 Denise 40 Julie 50 Ashley 50 Ron 60 Stanley 60 Kegan 90 Sam 70 John 60 whose grade do you want? Ashley Ashley has got 50 points.Reading names of students and to replace one of the names. 1. Ask the user for the name in the list. 2. If found, string copy the new name( say Joan) on the old name. 3. if not found, report it. printf("\nwhich name you want to change?"); scanf("%s",newname); newpos = find(student, grade, newname,SIZE); printf("\nnewpos= %d",newpos); if ( newpos == -1) printf("\nThere is no student by this name."); else strcpy(student[newpos],"Joan"); examdata.txt Sonya David Denise Julie Ashley Ron Stan Kegan Sam Jo hn which name you want to change? Ashley Sonya David Denise Julie Joan Ron Stan Kegan Sam JohnReversing the order of elements in a string array. 1. Use a for loop to go to middle of the array. 2. Swap the last name with the first name, that is, swap the item located at position 0 with item located at n-1, and in general, swap item at i with item located at n-1-i. The contents of an array item_list[5] is