Delete File Data in C

1 year ago
Benjamin Taylor
1 minute

In C language, data deletion in files is achieved through File Operations. To delete data from a file, functions from the standard C library can be used. Here is a simple example:

#include <stdio.h>

int main() {
    FILE *fp;

    // 打开文件
    fp = fopen("example.txt", "w");
    
    if (fp == NULL) {
        printf("无法打开文件\n");
        return 1;
    }

    // 写入数据
    fprintf(fp, "Hello, World!");

    // 关闭文件
    fclose(fp);

    // 删除文件中的数据
    fp = fopen("example.txt", "w");

    // 关闭文件
    fclose(fp);

    printf("文件数据已删除\n");

    return 0;
}

In the above example, we begin by opening a file (“example.txt”), writing data (“Hello, World!”), and then closing the file. Then we reopen the file and open it with the “w” mode, which will clear the data in the file. Lastly, we close the file and output “File data has been deleted.”

It is important to note that opening a file in “w” mode will clear the data in the file. If you want to append data instead of deleting it, you can use the “a” mode.

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