当我尝试将输入分配到'grades'数组时，我无法理解为什么我收到此错误消息。还有一条消息称“智能感知：无操作员”＆gt;＆gt; “匹配这些操作数，操作数类型是：std :: istream＆gt;＆gt; GradeType”。请给我任何帮助或提示。提前谢谢。
// This program will input an undetermined number of student names
// and a number of grades for each student. The number of grades is
// given by the user. The grades are stored in an array.
// Two functions are called for each student.
// One function will give the numeric average of their grades.
// The other function will give a letter grade to that average.
// Grades are assigned on a 10 point spread.
// 90-100 A 80- 89 B 70-79 C 60-69 D Below 60 F
#include <iostream>
using namespace std;
const int MAXGRADE = 25; // maximum number of grades per student
const int MAXCHAR = 30; // maximum characters used in a name
typedef char StringType30[MAXCHAR + 1];// character array data type used for names
// having 30 characters or less.
typedef float GradeType[MAXGRADE]; // one dimensional integer array data type
float findGradeAvg(GradeType, int); // finds grade average by taking array of
// grades and number of grades as parameters
char findLetterGrade(float); // finds letter grade from average given
// to it as a parameter
int main()
{
StringType30 firstname, lastname; // two arrays of characters defined
int numOfGrades; // holds the number of grades
GradeType grades; // grades is defined as a one dimensional array
float average; // holds the average of a student's grade
char moreinput; // determines if there is more input
// Input the number of grades for each student
cout << "Please input the number of grades each student will receive." << endl
<< "This number must be a number between 1 and " << MAXGRADE << " inclusive" << endl;
cin >> numOfGrades;
while (numOfGrades > MAXGRADE || numOfGrades < 1)
{
cout << "Please input the number of grades for each student." << endl
<< "This number must be a number between 1 and " << MAXGRADE << " inclusive" << endl;
cin >> numOfGrades;
}
// Input names and grades for each student
cout << "Please input a y if you want to input more students"
<< " any other character will stop the input" << endl;
cin >> moreinput;
while ( moreinput == 'y' || moreinput == 'Y')
{
cout << "Please input the first name of the student" << endl;
cin >> firstname;
cout << endl << "Please input the last name of the student" << endl;
cin >> lastname;
for (int count = 0; count < numOfGrades; count++)
{
cout << endl << "Please input a grade" << endl;
cin >> grades;
// Fill in the input statement to place grade in the array
}
cout << firstname << ' ' << lastname << " has an average of ";
cout << findGradeAvg; // Fill in code to get and print average of student to screen
cout << findLetterGrade;// Fill in call to get and print letter grade of student to screen
cout << endl << endl << endl;
cout << "Please input a y if you want to input more students"
<< " any other character will stop the input" << endl;
cin >> moreinput;
}
return 0;
}
//***********************************************************************
// findGradeAvg
//
// task: This function finds the average of the
// numbers stored in an array.
//
// data in: an array of integer numbers
// data returned: the average of all numbers in the array
//
//***********************************************************************
float findGradeAvg(GradeType array, int numgrades)
{
float sum = 0;
for (int pos = 0; pos < numgrades; pos++)
{
sum = sum + array[pos];
}
return (sum / numgrades); // Fill in the code for this function
}
//***********************************************************************
// findLetterGrade
//
// task: This function finds the letter grade for the number
// passed to it by the calling function
//
// data in: a floating point number
// data returned: the grade (based on a 10 point spread) of the number
// passed to the function
//
//***********************************************************************
char findLetterGrade(float numgrade)
{
if (numgrade >= 90 && numgrade <= 100)
{
return 'A';
}
if (numgrade >= 80 && numgrade <= 89)
{
return 'B';
}
if (numgrade >= 70 && numgrade <= 79)// Fill in the code for this function
{
return 'C';
}
if (numgrade >= 60 && numgrade <= 69)
{
return 'D';
}
else
{
return 'F';
}
}
答案 0 :(得分：1)
grades是一个数组。
所以，使用
cin >> grades[count];
可能是更多问题