Inputting String in C programming language
In C programming language, the strings doesn't have a special data type on it's own. So it's usually represented with characters itself.
Usually an array of characters is used to represent characters like this:
``
int char[1000];
``
Characters can be read by variety of methods like:
1. scanf("%s", char);
It can read a single string, but reading strings with spaces is not supported by scanf operators
2. Then there is getline() function which is defined in C programming lanaguage book. It's actually part of
the build in library.
```
#include <stdio.h>
#include <string.h>
int main()
{
int bytes_read;
int nbytes = 100;
char *my_string;
puts ("Please enter a line of text.");
/* These 2 lines are the heart of the program. */
my_string = (char *) malloc (nbytes + 1);
bytes_read = getline (&my_string, &nbytes, stdin);
if (bytes_read == -1)
{
puts ("ERROR!");
}
else
{
puts ("You typed:");
puts (my_string);
printf("%d", strlen(my_string));
}
return 0;
}
```
3. There is gets() functions which is generally considered as unsafe
4. fgets() is more safe as it provides a bounded input
```
fgets(string, 1000, stdin);
```
For more details check [this stackoverflow answer](https://stackoverflow.com/questions/2008173/writing-secure-c-and-secure-c-idioms)
As a bonus, I am sharing how to `find Pangram of a given string in C`
{% highlight linenos %}
#include<stdio.h>
#include<string.h>
#define MAX_LIMIT 1000
int main() {
char string[MAX_LIMIT];
int character_hash[26]={0};
int pancount = 0;
fgets(string, 1000, stdin);
for(int i=0; i<strlen(string); i++) {
if('a'<=string[i] && string[i]<='z') {
character_hash[string[i]-'a'] += 1;
}
else if('A'<=string[i] && string[i]<='Z') {
character_hash[string[i]-'A'] += 1;
}
}
for(int i=0;i<26;i++){
if(character_hash[i]==0) {
pancount=1;
}
}
if(pancount==0) {
printf("Pangram");
}
else if(pancount==1) {
printf("Not Pangram\n");
for(int i=0;i<26;i++) {
if(character_hash[i]==0) {
printf("%c ", i+'a'); }
}
}
}
{% endhighlight %}
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