C语言练习题文件操作

#include <stdio.h>
#include <stdlib.h>

int main() {
    FILE *fp;
    char filename[] = "ex5.txt";
    char content[] = "This is a file created by ex5.c";

    // 写入文件
    fp = fopen(filename, "w");
    if (fp == NULL) {
        printf("File creation failed.\n");
        exit(1);
    }
    fprintf(fp, "%s\n", content);
    fclose(fp);

    // 读取文件
    char readContent[100];
    fp = fopen(filename, "r");
    if (fp == NULL) {
        printf("File opening failed.\n");
        exit(1);
    }
    fscanf(fp, "%s", readContent);
    fclose(fp);

    printf("The content of the file is: %s\n", readContent);

    return 0;
}
</stdlib.h></stdio.h>