[英]How do you fix c++ expected primary expression error?
So, i'm new to c++ programming, and as a assignment my teacher is having us create an app. 所以,我是C ++编程的新手,作为一项任务,我的老师正在让我们创建一个应用程序。 I started coding it and this is what i came up with.
我开始编码,这就是我想出的。 I tried to compile the code in CodeBlocks and it gave me quite a few errors:
我试图在CodeBlocks中编译代码,这给了我很多错误:
error: expected primary-expression before 'petProfile' in int main() in case 1 through case 3 of the switch statement. 错误:在情况1到情况3的switch语句中,int main()中'petProfile'之前的预期主表达式 。
error: no match for 'operator=' in '(*(petProfile + ((sizetype) ((unsigned int)petIndex) * 4u))))->Pet::vaccNames = nextVaccN' It comes from this line of code: petProfile[petIndex]->vaccNames = nextVaccN; 错误:'(*(petProfile +((sizetype)((unsigned int)petIndex)* 4u))))-> Pet :: vaccNames = nextVaccN'中的'operator ='不匹配它来自以下代码行: petProfile [petIndex]-> vaccNames = nextVaccN;
Same kind of error for: petProfile[petIndex]->vaccDates = nextVaccD; 类似错误: petProfile [petIndex]-> vaccDates = nextVaccD;
And, petProfile[petIndex]->timeBetween = nextTimeDiff; 并且,petProfile [petIndex]-> timeBetween = nextTimeDiff;
Any help i could get would really be appreciated, Thank you. 我能得到的任何帮助将不胜感激,谢谢。
//Constant
const int maxNumOfPet = 8;
//Functions
void newProfile(Pet petProfile);
void updateExist(Pet petProfile);
void viewPetFile(Pet petProfile);
void howToUse();
int main()
{
int usersOption;
int* optionPointer = &usersOption;
Pet petProfile[maxNumOfPet];
//the do while loop will start here, it will display the start menu, and direct to the different functions
//until the user selects to exit.
do
{
//Displays the different options to the user.
cout << "\n1) Create New Pet Profile" << endl;
cout << "2) Update A Existing Profile" << endl;
cout << "3) View A Pet Profile" << endl;
cout << "4) How To Use" << endl;
cout << "5) Quit" << endl;
cout << "Please pick the option you wish to do." << endl;
cin >> *optionPointer;
switch (usersOption)
{
case 1:
newProfile(Pet petProfile);
break;
case 2:
updateExist(Pet petProfile);
break;
case 3:
viewPetFile(Pet petProfile);
break;
case 4:
howToUse();
break;
case 5:
cout << "Bye, Bye!";
return 0;
} //End of Switch Statement
} while (usersOption >= 1 || usersOption < 5);
return 0;
}
void newProfile(Pet *petProfile[], const int maxNumOfPet)
{
int changeOp;
int nextVaccD;
char correct;
double nextTimeDiff;
string nextVaccN;
int petIndex = 0;
while (petIndex <= maxNumOfPet)
{
//check if Pet is empty
while (petProfile[petIndex]->petNames.empty())
{
//Will receive the users input for the following topics, and add it to their vectors.
cout << "Please enter your pet's name, Or enter 0 to quit. " << endl;
if ( cin.peek() == '\n' )
cin.ignore();
string nextPetN;
getline(cin, nextPetN);
if (nextPetN == "0")
return;
//Will add an element to the vector petNames and save the users input to it.
petProfile[petIndex]->petNames = nextPetN;
cout << "Please enter the type of animal you have:" << endl;
if ( cin.peek() == '\n' )
cin.ignore();
string nextAnimalT;
getline(cin, nextAnimalT);
//Will add an element to the vector animalType and save the users input to it.
petProfile[petIndex]->animalType = nextAnimalT;
cout << "Please enter the name of a vaccine the pet has got: " << endl;
cin >> nextVaccN;
//Will add an element to the vector vaccNames and save the users input to it.
petProfile[petIndex]->vaccNames = nextVaccN;
cout << "Please enter the date " << nextVaccN << " was given, in this format MMDDYYYY." << endl;
cin >> nextVaccD;
//Will add an element to the vector vaccDates and save the users input to it.
petProfile[petIndex]->vaccDates = nextVaccD;
cout << "Please enter the time difference between each administration of this vaccine: " << endl;
cin >> nextTimeDiff;
//Will add an element to the vector timeBetween and save the users input to it.
petProfile[petIndex]->timeBetween = nextTimeDiff;
//Recap the information entered, and change if it is necessary.
cout << "\nSo far you entered: " << endl;
cout << nextPetN << endl;
cout << nextAnimalT << endl;
cout << nextVaccN << endl;
cout << nextVaccD << endl;
cout << nextTimeDiff << endl;
cout << "Is this information correct?" << endl;
cout << "Answer T if this is true or F if this is false" << endl;
cin >> correct;
if (correct == 'F' || correct == 'f')
{
cout << "What do you wish to change: " << endl;
cout << "1) " << nextPetN << endl;
cout << "2) " << nextAnimalT << endl;
cout << "3) " << nextVaccN << endl;
cout << "4) " << nextVaccD << endl;
cout << "5) " << nextTimeDiff << endl;
cin >> changeOp;
switch (changeOp)
{
case 1:
cout << "Please enter your pets' name: " << endl;
getline(cin, nextPetN);
break;
case 2:
cout << "Please enter the type of animal you have:" << endl;
getline(cin, nextAnimalT);
break;
case 3:
cout << "Please enter the name of the vaccines the pet has got: " << endl;
getline(cin, nextVaccN);
break;
case 4:
cout << "Please enter the date " << nextVaccN << " was given, in this format MMDDYYYY." << endl;
cin >> nextVaccD;
break;
case 5:
cout << "Please enter the time difference between each administration of this vaccine: " << endl;
cin >> nextTimeDiff;
break;
} //end switch
} //end if statement
}//end second while loop
} //end first while loop
petIndex++;
} //end newProfile function
Your function declaration 您的函数声明
void newProfile(Pet petProfile);
does not correspond to the definition 与定义不符
void newProfile(Pet *petProfile[], const int maxNumOfPet)
Also, the line(s) 另外,该行
case 1:
newProfile(Pet petProfile);
should be 应该
case 1:
newProfile(petProfile); // no Pet here, same for the other case-s
Check that your other function declarations match their definitions. 检查其他函数声明是否与它们的定义匹配。
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