C语言中fprintf_c语言gets函数用法

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发布于 2022-09-27 10:02:38

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发布于 2022-09-27 10:02:38

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c语言中fprintf函数

C中的fprintf()函数 (fprintf() function in C)

Prototype:

原型：

    int fprintf(FILE *filename, const char *string, . . . .);

Parameters:

参数：

    FILE *filename, const char *string etc.

Return type: int

返回类型： int

Use of function:

使用功能：

Like printf() function, fprintf() function is used to write the argument statement string on the file stream. Through the fprintf() function we write or store the values with the string. The prototype of the function fprintf() is: int fprintf(FILE *filename, const char *string, . . . .);

与printf()函数类似， fprintf()函数用于在文件流上写入参数声明字符串。通过fprintf()函数，我们可以将值写入或存储在字符串中。函数fprintf()的原型是： int fprintf(FILE * filename，const char * string，。。。);

Here string is the user defined string along with the existing data types (likes int, float, char etc).

这里的string是用户定义的字符串以及现有的数据类型(例如int，float，char等)。

C中的fprintf()示例 (fprintf() example in C)

#include<stdio.h>
#include<stdlib.h>
int main()
{
   
   
	//Initialize the file pointer
	FILE *f;
	char ch[100];
	
	// open the file for read and write operation
	if((f=fopen("includehelp.txt","r+"))==NULL){
   
   
		//if the file does not exist print the string
		printf("Cannot open the file...");
		exit(1);
	}
	
	for(int i=0;i<10;i++){
   
   
		//enter the strings with values in the file
		fprintf(f,"The count number is %d\n",i+1);	
	}
	fclose(f);
	
	// open the file for read and write operation
	if((f=fopen("includehelp.txt","r+"))==NULL){
   
   
		//if the file does not exist print the string
		printf("Cannot open the file...");
		exit(1);
	}

	printf("File content is--\n");
	printf("\n...............print the strings..............\n\n");
	while(!feof(f)){
   
   
		//takes the first 100 character in the character array 
		fgets(ch,100,f);
		//and print the strings
		printf("%s",ch);
	}
	//close the file
	fclose(f);
	
	return 0;
}

Output

输出量