Programming

$ cat s.c
#include <stdio.h>
#include <string.h>
main()
{
        char a[]="!_30";
        char b[]="cool++";
        printf("a = %s \n", a);
        strncpy(a,b,strlen(a));
        printf("a = %s \n", a);
        exit(0);
}
$ gcc s.c -o s
$ ./s
a = !_30
a = cool

#include <stdio.h>
#include <string.h>
main()
{
        char a[]="not working";
        char b[]="cool++";
        printf("a = %s \n", a);
        strncpy(a,b,strlen(b)-2);
        printf("a = %s \n", a);
        printf("b = %s \n",b);
        exit(0);
}

#include <stdio.h>
#include <string.h>

int
main()
{

char a[]="now is working";
char b[]="cool++";
char bug[256];
int g;

printf("a = %s \n",a);

        for (g=0;g<strlen(b)-2;g++)
                      { bug[g]=b[g]; }
                       bug[g]='\0';
        stpcpy(a,bug);
        printf("a = %s \n",a);
exit(0);


        }

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
main()
{
        char a[]="not working";
        char b[]="cool++";
        printf("a = %s \n", a);
        memset( a , '\0' , strlen(a) );
        strncpy(a,b,strlen(b)-2);
        printf("a = %s \n", a);
        printf("b = %s \n",b);
        exit(0);
}
$ a.out
a = not working
a = cool
b = cool++

#include<stdio.h>
#include<string.h>

int main() {

        char s[]="send !_30 <what I wanna send>";
        char s1[10];
        char s2[]="tesT";
        char s3[]="tesT";
        
        /* strncpy to copy strings */
        strncpy(s1,s+5,4);
        fprintf(stdout,"%s\n",s1);
        
        if(strcmp(s2,s3)==0) {
                fprintf(stdout,"strings are identical...\n");
        }
}