Visual Studio 2015 显示调试断言失败

Question

我做了一个简单的文件读取程序，在DEV C gcc编译器中成功运行，但显示错误

Debug Assertion Failed

。 我搜了一下，12天前有人问过同样的问题， 答案表明他的错误在于声明中

if (file = fopen (name, "w+") == NULL) {
  ...
}    

并将这两个语句分开为

file = fopen(name, "w+");

if (fp == NULL) { ...}    

我的代码

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
int main()
{

    int nos = 0, noc = 0, nol = 0;
    char ch;
    FILE *fp;
    fp = fopen("Sarju.txt", "r");
    while (1)
    {
        ch = fgetc(fp);
        if (ch == NULL)
        {
            printf("The file didn't opened\n");
            break;
        }
        if (ch == EOF)
            break;
        noc++;
        if (ch == ' ')
            nos++;
        if (ch == '\n')
            nol++;
    }
    if (ch != NULL)
        fclose(fp);
    printf("Number of Space : %d\nNumber of Characters : %d\nNumber of lines : %d\n", nos, noc, nol);
    _getch();
    return 0;
}    `

我的错误

调试断言失败！程序：...o 2015\Projects\Let Us C Solutions\Debug\Let Us C Solutions.exe 文件：minkerne