Thread: Converte from c++ to c

Can anyone help me to convert this code from c++ to c

Code:

#include <iostream>

#include <iomanip>

 

using namespace std;

float calcAvgGrade(float G1, float G2, float G3, float G4)

{

return (G1 + G2 + G3 + G4)/4;

}

 

char findLetter(float Grade)

{

if(Grade >= 90)

return 'A';

else if(Grade >= 80)

return 'B';

else if(Grade >= 70)

return 'C';

else if(Grade >= 60)

return 'D';

else if(Grade >= 50)

return 'F';

else return 'U';

}

int main()

{

freopen("input_File.txt", "r", stdin);

freopen("output_File.txt", "w", stdout);

string name;

while(cin >> name)

{

string lastName;

cin >> lastName;

float grades[4];

for (int i = 0; i < 4; ++i) {

cin >> grades[i];

}

float avg = calcAvgGrade(grades[0], grades[1], grades[2], grades[3]);

char grade = findLetter(avg);

 

cout << name << " " << lastName << '\t' << "Average: " << fixed << setprecision(2) << avg << '\t' << "Grade: " << grade << endl;

}

return 0;

}

Can anyone help me to convert this code from c++ to c

It would be better if you just started from scratch, find a good C solution instead of the poor C++ solution you have currently found. But whatever the case you need to show what you've tried.

Ok my friend I have tried with this code :

Code:

#include <stdio.h>



float calculate_average(float grade1,float grade2,float grade3,float grade4)

{

float avg;

avg = (grade1+grade2+grade3+grade4)/4;

return avg;

}


char find_letter_grade(float avg)

{


char lettergrade;

if(avg>=90 && avg<=100){

lettergrade='A';}

else if(avg >=80 && avg<=89.9){

lettergrade='B';}

else if(avg >=70 && avg<=79.9){

lettergrade='C';}

else if(avg >=60 && avg<=69.9){

lettergrade='D';}

else if(avg >=50 && avg<=59.9){

lettergrade='F';}

else if(avg >=0 && avg<=49.9){

lettergrade='U';}

}


int main()

{


FILE *inputfile;

FILE *outputfile;

char buffer[500];

float grade1,grade2,grade3,grade4, avg;

char firstname[50];

char lastname[50];

char grade[50];



inputfile=fopen("input_file.txt","r");

if (inputfile == NULL)

{

printf("File does not exists \n");

return 0;

}



while (feof (inputfile) ==0)

{

fscanf(inputfile,"%s,%s,%f,%f,%f,%f",firstname,lastname,&grade1,&grade2,&grade3,&grade4);

calculate_average(float grade1,float grade2,float grade3,float grade4);

find_letter_grade(float avg);

printf(outputfile,"%f\t,%s\t,%s\t,%s\t",avg,lettergrade,firstname,lastname);

fgets(buffer,500,inputfile);

}


return 0;


}

But this code doesn't work.. Can you help me to correct the code?