c语言创建一个文件，在文件中写上hello world

Question

#include<stdio.h>    
int main()
{    
    FILE *opening;
    opening = fopen("hello.usr","w");
    fprintf(opening,"Hello world!");     
    fclose(opening);
    printf("Writing to the file was successful.\n");
    printf("Closing the program");
    return 0;
}

我试过用这段代码在 C 编程中创建一个文件并写入文本“Hello world!”在里面。这段代码有什么问题？

Answer 1

如果你想知道哪里出了问题，请检查 fopen

的结果

opening = fopen("hello.usr","w");
if (opening == NULL) {
    perror("fopen");
}