写入.txt 文件？

问题描述：

我怎样才能将一小段文本写入文件.txt？我在 Google 上搜索了 3-4 个小时，但还是找不到如何操作。

fwrite();有太多参数，我不知道如何使用它。

当您只想向.txt文件中写入名称和几个数字时，最容易使用的函数是什么？

char name;
int  number;
FILE *f;
f = fopen("contacts.pcl", "a");

printf("
New contact name: ");
scanf("%s", &name);
printf("New contact number: ");
scanf("%i", &number);

fprintf(f, "%c
[ %d ]

", name, number);
fclose(f);

解决方案 1：

FILE *f = fopen("file.txt", "w");
if (f == NULL)
{
    printf("Error opening file!
");
    exit(1);
}

/* print some text */
const char *text = "Write this to the file";
fprintf(f, "Some text: %s
", text);

/* print integers and floats */
int i = 1;
float pi= 3.1415927;
fprintf(f, "Integer: %d, float: %f
", i, pi);

/* printing single characters */
char c = 'A';
fprintf(f, "A character: %c
", c);

fclose(f);

解决方案 2：

FILE *fp;
char* str = "string";
int x = 10;

fp=fopen("test.txt", "w");
if(fp == NULL)
    exit(-1);
fprintf(fp, "This is a string which is written to a file
");
fprintf(fp, "The string has %d words and keyword %s
", x, str);
fclose(fp);

解决方案 3：

嗯，你首先需要找一本关于 C 语言的好书，并且理解这门语言。

FILE *fp;
fp = fopen("c:\\test.txt", "wb");
if(fp == null)
   return;
char x[10]="ABCDEFGHIJ";
fwrite(x, sizeof(x[0]), sizeof(x)/sizeof(x[0]), fp);
fclose(fp);