Debug Assertion Failed，Expression stream！= nullptr

Question

使用Visual Studio IDE編寫C程序正在讀取一個基本的.txt文件，從華氏轉換爲攝氏度並寫入新的.txt文件爲什麼不能找到它。 txt文件？這裏是我的代碼：

#define _CRT_SECURE_NO_WARNINGS 
#include <stdio.h> 
#include <stdlib.h> 
#include <math.h> 

int main(void) 
{ 
double tempArray[30]; 
double temp; 
double sum = 0; 
int input_status; 
int count = 0; 
double convert; 
FILE *infile, *outfile; 
infile = fopen("temperature.txt", "r"); 
if (infile == NULL) { 
    perror("Failed: "); 
    return 1; 
} 
outfile = fopen("results.txt", "w"); 

int i = 0; 
input_status = fscanf(infile, "%lf", &temp); 
double max, min = temp; 
while (input_status != EOF) 
{ 

    tempArray[i] = (temp - 32) * 5/9; ; 
    sum += tempArray[i]; 

    fprintf(outfile, "%f \n", tempArray[i]); 

    if (tempArray[i] > max) 
     max = tempArray[i]; 

    if (tempArray[i] < min) 
     min = tempArray[i]; 

    count++; 
    i++; 

    input_status = fscanf(infile, "%lf", &temp); 

} 

double average = sum/count; 

fprintf(outfile, "\n The average of the temperatures is %f \n", average); 
fprintf(outfile, "\n The maximum of the temperatures is %f \n", max); 
fprintf(outfile, "\n The minimum of the temperatures is %f \n", min); 

fclose(infile); 
fclose(outfile); 
system("pause"); 

}

here's where the .txt file is

this is the error code i received

Answer 1

我將文件命名爲「temperature.txt」，它已經是一個.txt文件，所以文件名實際上是「temperature.txt.txt」。小錯誤，大問題。謝謝你們的幫助。

Answer 2

運行在Debug文件夾（在這種情況下），所以temperature.txt需要可執行文件是文件夾中，或者它需要是"..\temperature.txt"或類似的傳入fopen()。