strpbrk in C

Purpose of strpbrk()

strpbrk() is one of the inbuilt string function in c programming which is used to return a string str1 from a character that matches any character specified in a string str2.

How strpbrk() Works

The following diagram clearly illustrate the working principle of strpbrk() inbuilt string function in C.

In the above diagram strpbrk() takes two parameters say str1 and str2. Both parameters are string. Here str2 contains a and n. Now strpbrk will scan the string str1 to find any possible occurance of a or n. Hopefully Denmark contains n thus strpbrk returns nmark

Syntax - strpbrk()

• strpbrk() function accepts two parameters say str1 and str2
• Both parameters are string.
• To use strpbrk() inbuilt string function in C, we need to declare #include<string.h> header file.

strpbrk(str1, str2);

C Program - strpbrk()

Let us work through strpbrk() function. In the following program we will search for the first occurance of n or a in Denmark.

#include <stdio.h>
#include<string.h>
int main()
{
char str1[] = "Denmark";
char str2[]= "an";
char *res;
res = strpbrk(str1, str2);
printf("%s",res);
return 0;
}

nmark

C Program - Without strpbrk()

Here we will write a program to search for the first occurance of n or a in Denmark without using any inbuilt string functions.

#include <stdio.h>
#include<string.h>
int main()
{
char str1[20] = "Denmark";
char str2[5] = "an";
int len1, len2, i, j, k;
for(len1 = 0; str1[len1] !='\0';len1++)
{
// to find a length of string str1
}
for(len2=0; str2[len2] != '\0';len2++)
{
// to find a length of string str2
}
for(i = 0 ; i < len1; i++)
{
for(j = 0; j < len2; j++)
{
if(str1[i] == str2[j])
{
for(k = i; str1[k]!= '\0'; k++)
printf("%c",str1[k]);
return 0;
}
}
}
return 0;
}

nmark

Did You Know?

strpbrk() is case sensitive.

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