fgets() and gets() in C

fgets()

This functionfgets()Used to read a string until the newline character. It checks array bounds and is safe.

This isfgets()C language syntax

char　*fgets(char　*string, int value, FILE　*stream)

Here,

String-This is a pointer to a char array.

value-Number of characters to read.

Stream-This is a pointer to a file object.

This isfgets()C language example

Example

#include <stdio.h>
#define FUNC　8
int main() {
　　　char b[FUNC];
　　　fgets(b, FUNC, stdin);
　　　printf("The string is: %s\n", b);
　　　return 0;
}

Output result

The input string is "Hello World!" in the standard input stream.

The string is: Hello W

In the above program, a char type array is declared. This functionfgets()Reads characters from the STDIN stream until the specified number. It does not check array bounds.

char b[FUNC];
fgets(b, FUNC, stdin);

gets()

This functiongets()Used to read a string from the standard input device. It does not check array bounds and is not safe.

This isgets()C language syntax

char　*gets(char　*string);

Here,

String-This is a pointer to a char array.

This isgets()C language example

Example

#include <stdio.h>
#include <string.h>
int main() {
　　　char s[100];
　　　int i;
　　　printf("\nEnter a string: ");
　　　gets(s);
　　　for(i = 0; s[i] != '\0'; i++) {
　　　　　　if(s[i] >= 'a' && s[i] <= 'z') {
　　　　　　　　　s[i] = s[i]　-　32;
　　　　　　}
　　　}
　　　printf("\nString in Upper Case = %s", s);
　　　return 0;
}

Output result

Enter a string: hello world!
String in Upper Case = HELLO WORLD!

In the above program, the string s in the char array is converted to uppercase. This functiongets()Used to read a string from the stdin stream.

char s[100];
int i;
printf("\nEnter a string: ");
gets(s);