#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <regex.h>
 
int main(void)
{
    char name[]= "Michael Corleone";
    char inputName[40];
 
    regex_t regex;
    int return_value;
 
    printf("Enter name: ");
    fgets(inputName, sizeof(inputName), stdin);
    // Remove new line from fgets
    inputName[strcspn(inputName, "\n")] = 0;
 
    // Regcomp string input by user as pattern
    return_value = regcomp(&regex, inputName, REG_ICASE); // 0 replaced with REG_ICASE
    // Regexec string that will match against user input
    return_value = regexec(&regex, name, 0, NULL, 0);
 
    if (return_value == REG_NOMATCH)
    {
        printf("Pattern not found.\n");
        return 1;
    }
    else
    {
        printf("%s\n", name);
    }
}

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Y29ybGVvbmU=

corleone