我的程序假设读取Numbers文本文件,这是我列出我的数字并将它们存储到一个数组中,然后显示在5列中。我的问题是它根本不会显示数组。我不知道为什么。
#include <stdio.h>
#include <stdlib.h>
#define ELEMENTS 100
void fillArray(FILE *, double [], double *);
void printArray(double [], double);
double findMIN(double [], double);
double findMAX(double [], double);
int main()
{
FILE *doublefp;
double values[ELEMENTS];
double elements;
int status;
status = fopen_s(&doublefp, "Numbers.txt", "r");
if (status != 0)
{
printf("Unable to open the file Numbers.txt\n");
system("PAUSE");
exit(99);
}
fillArray(doublefp, values, &elements);
printArray(values, elements);
printf("The minimum value is %d\n", findMIN(values, elements));
printf("The maximum value is %d\n", findMAX(values, elements));
system ("PAUSE");
return 0;
}
double findMIN(double nums[], double element)
{
int i;
double min = nums[0];
for (i = 1; i < element; i++)
if (min > nums[i])
min = nums[i];
return (min);
}
double findMAX(double nums[], double element)
{
int i;
double max = nums[0];
for (i = 1; i < element; i++)
if (max < nums[i])
max = nums[i];
return (max);
}
void fillArray (FILE *fp, double nums[], int *count)
{
double number;
printf("Enter up to %d integers press the F6 key to end input. \n", ELEMENTS);
*count = 0;
while (fscanf_s(fp, "%d", &nums[*count]) != EOF)
{
(*count)++;
}
}
void printArray (double nums[], double elements)
{
int count;
printf("Values in array:\n");
for (count = 0; count < elements; count++)
{
printf("%5d ",nums[count]);
if ((count+1)% 10 == 0)
printf("\n");
}
printf("\n");printf("\n");
}
我的号码在如下列出的文本文件中: 23.53 56.8 12.1 677.23 122.09 788.18 123.25 65.12 98.18 622.27 366.34 433.45 844.56 244.67 544.78 290.10 189.28 522.17 321.33 178.76
答案 0 :(得分:2)
基本上,double elements;
必须是int elements
此处&elements
是double *
,函数fillArray
需要int *
fillArray(doublefp, values, &elements);
您是否在编译器中启用了警告?
此外,在printArray
中,elements
被定义为double
时应为int
。
与findMax
和findMin
相同。
printf("%5d ",nums[count]);
应为printf("%lf ",nums[count]);
打开编辑器中的所有警告,修复它们,然后再次询问它是否无效。
答案 1 :(得分:1)
两个问题:
1)您的“printf()”格式语句应使用“%d”打印整数,使用“%lf”打印双打。你不是一直这样做的。
2)你最好使用“int”来“计算数字”而不是双倍。不幸的是,你也没有这样做。
建议更改:
#include <stdio.h>
#include <stdlib.h>
#define ELEMENTS 100
void fillArray(FILE * fp, double values [], int * count);
void printArray(double values[] int count);
double findMIN(double values[], int count);
double findMAX(double values[], int count);
int main()
{
FILE *doublefp;
double values[ELEMENTS];
int elements;
int status;
status = fopen_s(&doublefp, "Numbers.txt", "r");
if (status != 0)
{
printf("Unable to open the file Numbers.txt\n");
system("PAUSE");
exit(99);
}
fillArray(doublefp, values, &elements);
printArray(values, elements);
printf("The minimum value is %f\n", findMIN(values, elements));
printf("The maximum value is %f\n", findMAX(values, elements));
system ("PAUSE");
...
double findMIN(double nums[], int count)
...
void fillArray (FILE *fp, double nums[], int *count)
{
printf("Enter up to %d integers press the F6 key to end input. \n", ELEMENTS);
*count = 0;
while (fscanf_s(fp, "%f", &nums[*count]) != EOF)
{
(*count)++;
}
...