c - 使指针指向整数而不进行强制转换

Question

我的代码有点问题。编译器告诉我，我的代码在没有转换的情况下创建了一个指向整数的指针。现在我不熟悉这意味着什么所以也许有人可以指出(双关语非常有意)我在正确的方向。也将不胜感激任何一般提示!

准确的错误是:

Homework3.c: In function ‘main’:
Homework3.c:32: warning: passing argument 1 of ‘add’ makes pointer from integer without a cast
Homework3.c:16: note: expected ‘int (*)[5]’ but argument is of type ‘int’

---

 #include <stdio.h>
 #include <stdlib.h>
 #define INPUT_FILE_NAME "amounts.txt"
 #define PRODUCTS 5
 #define SALESPERSON 4
 #define AMOUNT 1449
 #define TOTALS 20

 void printOut(int [SALESPERSON][PRODUCTS], float [TOTALS]);
 float add(int [SALESPERSON][PRODUCTS], float, float [TOTALS] );

 int main(void){

    FILE *inputFile;
    int sales[SALESPERSON][PRODUCTS];

    float data = 0.0;
    float totals[TOTALS];
    int count;

    inputFile = fopen(INPUT_FILE_NAME, "r");
    for ( count = 0; count < AMOUNT; count++){
        fscanf(inputFile, "%d", sales[SALESPERSON]);
        fscanf(inputFile, "%d", sales[SALESPERSON][PRODUCTS]);
        fscanf(inputFile, "%f", &data);
        add(sales[SALESPERSON][PRODUCTS], data, totals[TOTALS]);
    }
    fclose(inputFile);

    printOut(sales[SALESPERSON][PRODUCTS], totals[TOTALS]);

    return 0;
 }

 void printOut(sales[SALESPERSON][PRODUCTS], totals[TOTALS]){

    int count2 = 0;
    int count3 = 0;
    int count4 = 0;

    for(count2 = 0; count2 < SALESPERSON; count2++){    
        for(count3 = 0; count3 < PRODUCTS; count3++){
            printf("Sales Person %d \t Product%d \t Total: %.2f\n", count2, count3, totals[count4]);
            ++count4;
        }
    }
    return ;
 }

 void add(sales[SALESPERSON][PRODUCTS], data, totals[TOTALS]){


    if(sales[SALESPERSON] == 1){
        if(sales[SALESPERSON][PRODUCTS] == 1){
            totals[0] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 2){
            totals[1] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 3){
            totals[2] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 4){
            totals[3] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 5){
            totals[4] += data;
        }
    }
    else if(sales[SALESPERSON] == 2){
        if(sales[SALESPERSON][PRODUCTS] == 1){
            totals[5] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 2){
            totals[6] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 3){
            totals[7] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 4){
            totals[8] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 5){
            totals[9] += data;
        }
    }
    else if(sales[SALESPERSON] == 3){
        if(sales[SALESPERSON][PRODUCTS] == 1){
            totals[10] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 2){
            totals[11] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 3){
            totals[12] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 4){
            totals[13] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 5){
            totals[14] += data;
        }
    }
    else if(sales[SALESPERSON] == 4){
        if(sales[SALESPERSON][PRODUCTS] == 1){
            totals[15] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 2){
            totals[16] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 3){
            totals[17] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 4){
            totals[18] += data;
        }
        else if(sales[SALESPERSON][PRODUCTS] == 5){
            totals[19] += data;
        }
    }

 }

Answer 1

sales[SALESPERSON][PRODUCTS] 返回 sales< 中位置 SALESPERSON 引用的数组的位置 PRODUCTS 处的整数。你只需要通过sales:

add(sales, data, totals); //same thing with totals

你也没有给出函数数组的长度，所以你的定义应该是:

void add(int[][] sales, float data, float[] totals)