代码

Question

所以，我全局定义了我的函数，因此它们被识别，但我不允许全局定义我的变量，现在我的函数定义中无法识别我的变量。（错误：＆＃34;标识符-variableName-未定义＆＃34;。）任何解决此问题的建议都将非常感谢！

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#define PAUSE system("pause")
#define SIZE 10
int main(void) {
    void enterNumbers();
    void addNumbers();
    void numbersAveraged();
    void displayNumbers();
    int i = 0;
    int usersArray[SIZE] = { 0 };
    int numbers = 0;
    int totalOfInput = 0;
    int averageOfInput = 0;
    int count = 0;
    int option = 0;
    do {

        printf("==========================================================\n");
        printf("=================Number Management System====================\n");
        printf("============================================================\n\n");
        printf("Things you can do here.\n");
        printf("\n1. Give us numbers to work with! \n");
        printf("\n2. Let Me add all the numbers you gave me.\n");
        printf("\n3. I  will display the average of all of the numbers you've put in.\n");
        printf("\n4. I will display all of the numbers you put in. \n");
        printf("\n5. Exit \n");
        scanf("%i", &option);

        switch (option) {
        case 1:
            enterNumbers();
            break;
        case 2:
            addNumbers();

            break;
        case 3:
            numbersAveraged();
            break;
        case 4:
            displayNumbers();
            break;
        case 5:
            exit(0);
            break;
        default:
            printf("This is not a valid choice, please type 1-5. ");
            PAUSE;
        }


    } while (option != 5);

    void enterNumbers(); {
        for (i = 0; i == SIZE; i++) {
            printf("Please type in a number. Enter -1 when you are done entering numbers.");
            scanf("%i", &usersArray[i]);
            count++;
            if (usersArray[i] == -1) {
                break;
            }
            if (i == SIZE) {
                printf("That's enough numbers! I can't hold any more I'm afraid.");
            }
        }
    }
    void addNumbers(); {
        void enterNumbers();
        for (i = 0; i < count; i++) {
            totalOfInput += usersArray[i];
        }
        printf("OK, so the total of all of these numbers is: %d", totalOfInput);
    }
    void numbersAveraged(); {
        addNumbers();
        averageOfInput = totalOfInput / i;
        printf(" The average of the numbers you added was %i", averageOfInput);
    }
    void displayNumbers(); {
        printf("OK, here are all of the numbers you put in. \n");
        for (i = 0; i < count; i++) {
            printf("%d \n", usersArray[i]);

        }
    }
}

Answer 1

C没有嵌套功能。我们将C中的全局变量声明为main()以上。为了存储某些数字的平均值，我们必须定义一个可以包含有理数的浮点变量（即5.69），因为a / b可能没有整数答案（10/3 = 3.33）。 float averageOfInput = 0;

我对您的来源执行了一些基本的更改，但它确实有效。但这不是一个好的或完整的版本。你可以通过学习更多C来改进它。

代码

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#define PAUSE system("pause")
#define SIZE 5


///Global Variables
int usersArray[SIZE] = { 0 };
int count = 0;
int numbers = 0;
int totalOfInput = 0;
float averageOfInput = 0;   
int i = 0;

///Function declaration 
void enterNumbers();
void addNumbers();
void numbersAveraged();
void displayNumbers();


int main(void)
{


    int option = 0;

    do {

    printf("\n");


    printf("==========================================================\n");
    printf("=================Number Management System====================\n");
    printf("============================================================\n\n\n\n");
    printf("Things you can do here.\n");
    printf("\n1. Give us numbers to work with! \n");
    printf("\n2. Let Me add all the numbers you gave me.\n");
    printf("\n3. I  will display the average of all of the numbers you've put in.\n");
    printf("\n4. I will display all of the numbers you put in. \n");
    printf("\n5. Exit \n");

    scanf("%i", &option);

    switch (option) {
    case 1:
        enterNumbers();
        break;
    case 2:
        addNumbers();
        break;
    case 3:
        numbersAveraged();
        break;
    case 4:
        displayNumbers();
        break;
    case 5:
        exit(0);
        break;
    default:
        printf("This is not a valid choice, please type 1-5. ");
        PAUSE;
    }


    } while (option != 5);

}//End main()



///Function definition 

void enterNumbers() 
{
    int temp;
    printf("Please type in a number. Enter -1 when you are done entering numbers.\n");

    for (i = 0; i < SIZE; i++) {
        scanf("%i", &temp);
        if (temp == -1) {
            break;
        }
        else {
            usersArray[i] = temp;   
            count++;
        }

    }
}


void addNumbers()
{
    totalOfInput = 0;
    enterNumbers();
    for (i = 0; i < count; i++) {
        totalOfInput += usersArray[i];
    }
    printf("OK, so the total of all of these numbers is: %d\n", totalOfInput);
}

void numbersAveraged(){
    addNumbers();
    averageOfInput = (float) totalOfInput / count;
    printf(" The average of the numbers you added was %f\n", averageOfInput);
}

void displayNumbers(){
    printf("OK, here are all of the numbers you put in.\n");
    for (i = 0; i < count; i++) {
        printf("%d \n", usersArray[i]);
    }
}

C：我的函数中的变量无法识别，因为我的变量不是全局变量

1 个答案:

代码