Print the first letter of each word in a sentence

Question

I am learning C programming and I am trying to print the first letter of each word in a sentence. I have written this code below but it doesn't seem to be working.

#include<stdio.h>
#include<string.h>
int main()
{
    char s[100];int i,l;
    scanf("%s",&s);
    l=strlen(s);
    printf("%c",s[0]);
    for(i=0;i<l;i++)
    {
        if(s[i]==' ')
        {
            printf("%c",s[i+1]);
        }
    }
 }

Input: Hello World

Expected Output: HW

Actual Output: (nothing)

Answer 1

The problem is in how you're reading the input:

scanf("%s",&s);

The %s format specifier to scanf reads characters until it encounters whitespace. This means it stops reading at the first space.

If you want to read a full line of text, use fgets instead:

fgets(s, sizeof(s), stdin);