无法输入全天数据并累计总计

Question

我遇到了一个错误，不允许我插入所有必需的数据。我确信我的 for 循环设置正确。我不太确定我缺少什么，但如果有人可以查看我的代码，我将非常感激!

我正在使用 Dev C++。

#include <stdio.h>




    float loadArray(float *) ; 

    float calcTotal(float *); // calc total sales

    int main()
    {
   //declare variables

   float sales[7];
   float weeklyS;
   float total;
float totalS;
float highest;

//since these are pointers in the func, u need an &
sales[7] = loadArray(&weeklyS);

total = calcTotal(&totalS);     // when calling a pointer use a & to send the address
printf("Total of the week is: %.2f",totalS);

//calcHighest(odom,odom2,milesDrvn,avgMPG);


return 0 ;  

}



float loadArray(float *weeklyS)   
{
float sales;
int x;

for ( x = 0; x < 7; x++)
{

// have user enter the following
printf("Enter sales for day %d: ",x  + 1);
scanf("%d",&*weeklyS);

}

return sales;
}


float calcTotal(float *totalS)
{

float total = 0 ; 
int x;

for ( x = 0; x < 7; x++)
{
    total +=  *totalS;
    *totalS++;

}




return total;  /// return the accumulator
}

我在代码中声明了一些注释来解释什么是做什么的，但我不太确定为什么这段代码没有按应有的方式运行。我已将所有变量声明为 float ，我相信我也已正确处理我的指针并使用 * 和 & 正确调用它们。

Answer 1

以下不是完整的答案，只是对单个函数的更正，并带有大量注释:

原代码:

float loadArray(float *weeklyS)   
{
    float sales;
    int x;

    for ( x = 0; x < 7; x++)
    {
        // have user enter the following
        printf("Enter sales for day %d: ",x  + 1);
        scanf("%d", weeklyS);
    }

    return sales;
}

更正后的代码:

给“神奇”数字一个有意义的名称

#define DAYS_IN_WEEK 7

在“main()”中，传递一个指向sales[]数组的指针。

loadArray( sales );

修改原型(prototype)和“main()”中的调用以匹配此签名

void loadArray(float *sales)   
{
    // keep the scope of a variable to the minimum
    for ( int x = 0; x < DAYS_IN_WEEK; x++)
    {
        static char *day[] =
        {
            "Sunday",
            "Monday",
            "Tuesday",
            "Wednesday",
            "Thursday",
            "Friday",
            "Saturday"
        };

        // have user enter the daily sales
        printf( "Enter sales for %s: ", day[x] );

       // check for errors on calls to system functions
       // note: 'sales+i' advances to pointer 'sales' 
       //      by the length of each 'float' entry 
       //      times the value in 'i'
       // compare the returned value to '1' 
       //      because that is the number of format specifiers
       // use the format specifier '%f' because the input
       //      is to be converted to a 'float' value
       // input sales amount 
       if( 1 != scanf( "%f", sales+i ) )
       {  // then error occurred

           // output your error message 
           // and the system error text 
           // to 'stderr'
           // note: 'perror()' is found in 'stdio.h'
           perror( "scanf failed" ); 

           // note: 'exit()' and EXIT_FAILURE found in 'stdlib.h' 
           // unrecoverable error, exit the program
           exit( EXIT_FAILURE );
       } // end handling error
   } // end for each days' sales
} // end function: loadArray