String with Exclamation Point

Task

Implement main.c file with a main function that reads a typed line of input form the user and prints that string followed by an exclamation point

• If the user enters more than 20 bytes, it should include only the first 20 bytes of what they typed

---

Test

$ gcc main.c -o main
$ ./main
hello
hello
!
$ ./main
this is really long and more than 20 chars
this is really long !

---

Code

#include <stdio.h>
#include <string.h>
 
int main(int argc, char** argv){
    char buffer[100];
    while(1){
        char* maybe_eof = fgets(buffer, sizeof(buffer), stdin);
        if(maybe_eof == NULL){break;}
 
        size_t len = strlen(buffer);
        if (len > 20){
            buffer[20] = '!';
            buffer[21] = 0;
        } else {
            buffer[len] = '!';
        }
 
        printf("%s\n", buffer);
    }
    return 0;
}