#include<stdio.h>
int main(){
    char a[1000];
    char *sub;
    int startFrom = 0;
    int endAt = 0;
 
    printf("Enter the String: ");		//HappyBirthday
    scanf("%s", a);
    printf("Start From? ");
    scanf("%d", &startFrom);
    printf("End At? ");
    scanf("%d", &endAt);
 
    sub = &a[startFrom];
    a[endAt] = '\0';
    printf("%s\n", sub);
 
    //Give startFrom as 2
    //and endAt as 5
 
    printf("%c",a[7]);	//You would still get 'r'
 
    printf("\n%s\n",a);
 
    return 0;
}

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SGFwcHlCaXJ0aGRheQoyCjU=

HappyBirthday
2
5