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ungetc() in C/C++
The function ungetc() takes a character and pushes it back to the stream so that the character could be read again.
Here is the syntax of ungetc() in C language,
int ungetc(int character, FILE *stream)
Here,
character − The character to be pushed back to stream.
stream − The pointer to the file object.
Here is an example of ungetc() in C language,
Example
#include <stdio.h>
int main() {
int c;
while ((c = getchar()) != '0')
putchar(c);
ungetc(c, stdin);
c = getchar();
putchar(c);
puts("");
printf("The End!");
return 0;
}Output
s a b c t h 0 The End!
In the above program, a character of int type is declared. It will read the characters until 0/zero encounters. It will display characters and as zero encounters, it prints “The End!”.
int c;
while ((c = getchar()) != '0')
putchar(c);
ungetc(c, stdin)
c = getchar();
putchar(c);
puts("");
printf("The End!");
Updated on: 26-Jun-2020
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