fwrite会阻塞嘛

时间: 2023-12-22 18:29:23 浏览: 180

fwrite函数不会阻塞。它是一个用于将数据写入文件的C库函数。当调用fwrite函数时，它会将指定数量的数据从内存缓冲区写入到文件中。fwrite函数是一个阻塞函数，它会等待数据写入完成后才返回。如果写入过程中发生错误，fwrite函数会返回一个小于预期写入数量的值。 #include <stdio.h> int main() { FILE *file = fopen("data.txt", "w"); if (file == NULL) { printf("Failed to open file.\n"); return 1; char data[] = "Hello, World!"; size_t size = sizeof(data[0]); size_t count = sizeof(data) / size; size_t written = fwrite(data, size, count, file); if (written != count) { printf("Failed to write data.\n"); } else { printf("Data written successfully.\n"); fclose(file); return 0;