In this article we will learn to implement a C program to compare two strings without using library function. A C program is provided below to compare two strings without using predefined function.
Program is as follows:
#include<stdio.h>
#include<string.h>
int main()
{
char str[20];
printf("Enter a string: ");
scanf("%s", str);
char newstr[20];
printf("Enter another string: ");
scanf("%s", newstr);
int flag = 0;
//We assume that both strings will be of same length
int i = 0;
while(i < strlen(str))
{
if(str[i] != newstr[i])
{
flag = 1;
break;
}
i++;
}
if(flag == 0)
printf("Strings are equal");
else
printf("Strings are not equal");
return 0;
}
Input and output for the above program is as follows:
Enter a string: madam
Enter another string: madam
Strings are equal
Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.
He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.
He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.
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