/*Problem 31 GROUP 3*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char* substr(char* str,int start,int end){
    end++;
    char* toReturn;
    int len=strlen(str);
    if(start<=0 || (start>(end-1) || (end-start)>len)  ){
        toReturn=(char*)malloc(sizeof(char)*(100));
        strcpy(toReturn,"Input valid start value and end value");
        return toReturn;
    }

    toReturn=(char*)malloc(sizeof(char)*(end-start+2));
    int x;
    for(x=0;x<end-start;x++){
        toReturn[x]=str[start-1+x];
    }
    toReturn[end-start+1]='\0';
    return toReturn;
}


int main(){
    printf("%s\n", substr("co222",1,0));
}