If string is equal to another string, print something

Question

For some reason this code doesn't output anything, what did I do wrong?

#include<stdio.h>
int main()
{
    char c;
    scanf("%s",&c);
    if(c=="ab")
    {
        printf("b");
    }
}

Answer 1

In C String is not of type character as you have declared (i.e., char c;). It's a pointer to a char. You need to check for equality as character by character or use standard library function strcmp.

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

int main(void)
{
   char c[100];
   scanf("%s", c);
   char *s = "ab";
   if (strcmp(c, s) == 0)
   {
      printf("They are Equal\n");
   }
}