//What's wrong with my code?

Letter grades are A B C D and F, possibly followed by + or - Their nu- meric values are 4, 3, 2, 1 and O. In our scheme, there is no F+ or F-, or Ar. Adding a + to the grade increases the numeric value by 0.3, a-de- creases it by 0.3. 15 // Function Prototypes 16 void printTitle(); 17 string getInput(); 18 double letterToPoints(stringIn letterGrade); 19 void printReport(double points); 20 21 // Constants 22 const double INVALID_COMBINATION = -1.0; 23 const double INVALID_INPUT = -2.0; 25 /** * Calculates the grade points for a letter grade. 27 * @return for success. 28 */ 29 int run() 30 { // Don't change anything inside this function printTitle(); string letterGrade = getInput(); double points = letterToPoints (letterGrade); printReport(points); 31 return 0; 40 // Implement your functions here 42 void printTitle() 43 { cout > gradeIn; return gradeIn; 56 double letterToPoints (stringin letterGrade) double gradePoints = -1; if (gradeIn == "A") gradePoints = 4.0; else if (gradeIn == "A-") gradePoints = 3.7; else if (grade In == "B+") gradePoints = 3.3; else if (gradeIn == "B") gradePoints = 3.0; else if (grade In == "B-") gradePoints = 2.7; else if (grade In == "C+") gradePoints = 2.3; else if (grade In == "C") gradePoints = 2.0; else if (gradeIn == "C-") gradePoints = 1.7; else if (gradeIn == "D+") gradePoints = 1.3; else if (gradeIn == "D") gradePoints = 1.0; if (grade In == "A") gradePoints = 4.0; else if (gradeIn == "A-") gradePoints = 3.7; else if (grade In == "B+") gradePoints = 3.3; else if (grade In == "B") gradePoints = 3.0; se if (grade In == "B-") gradePoints = 2.7; else if (grade In == "C+") gradePoints = 2.3; se if (gradeIn == "C") gradePoints = 2.0; else if (gradeIn == "C-") gradePoints = 1.7; else if (gradeIn == "D+") gradePoints = 1.3; else if (gradeIn == "D") gradePoints = 1.0; else if (gradeIn == "D-") gradePoints = 0.7; else if (gradeIn == "F") gradePoints = 0.0; return 0.0; 74 void printReport(double points) 75 { cout = 0) cout = 1 && gradeIn.at() != 'A' && gradeIn.at() != 'B' && gradeIn.at(0) != 'C' && gradeIn.at(0) != 'D' && gradeIn.at(0) != 'F) errorMessage = "INVALID LETTER GRADE"; else errorMessage= "Invalid Input" ; 24:1 C and C++ Tabs: 4