Thread: Case Sensitivity Help!!!

I Have Made A Program On C " Guess The Capital Game"!!! But I Have a Problem in Taking Answer From Users.. I Defaultly Store Answer In An Array.. as You Can See In The Code Below!! The Program Is Working Like This That ... when It Start A Question Came " What Is The Capital Of Pakistan?" And Answer Is "islamabad" Likewise 25 Question Came Step By Step.... But I Defaultly Store Answers In Lower Case If User Type "IslaMabad" << Like This ... It Consider Answer Wrong ... So Please Help Me That How Can i Remove Case Sensitivity In It So That If User Write In Any Case The answer Should Consider Correct.... Thanks!

Code:

#include<stdio.h>
#include<string.h>
void main()
{
  char country[25][50]={"Pakistan","Afghanistan","China","Srilanka","United Kingdom","India","Italy","America","Australia","Iran","Turkey","New Zealand","Ireland","Bangladesh","Zimbabwe","South Africa","Kenya","Iraq","Germany","Switzerland","Syria","Israel","Denmark","Japan","Indonesia"};
  char capital[25][50]={"islamabad","kabul","belgium","columbo","london","new dehli","rome","washington","canberra","tehran","istanbul","wellington","dublin","dhaka","harare","pretoria","nairobi","baghdad","berlin","berne","damascus","jerusalem","copenhegen","tokyo","jakarta"};
  char answer[25][50];
  int i=0;
  int score=0;
  clrscr();

  printf("************* Welcome To Guess The Capital General Knowledge Game! *************");
  printf("\n===================> Read Below Before Play<===================");
  printf("\n1) You Have To Answer 25 Questions!\n2) All Answers Should Be In Small Letters Otherwise Your Answer Will Be Consider Wrong\n3) Write Spellings Carefully. If Your Spelling is Incorrect Your Answer Will Consider Wrong And Your Score Will Not Counted..! \n/////////////////// Enjoy Playing! \\\\\\\\\\\\\\\\\\\\");
  printf("\n\n///////////////=====>> Game Made By 'Ali Raza' <<=====////////////////");
  for(i=0;i<25;i++)
  {
    printf("\n\n\nQ.%d: What Is The Capital Of %s?",i+1,country[i]);
    printf("\nAnswer: ");
    gets(answer[i]);
    if(strcmp(capital[i],answer[i])==0)
    {
      printf("==>> Answer Is Correct! <<==");
      score++;
    }
    else
    {
      printf("==>> Answer Is Wrong! <<==\n==>> Correct Answer Is: '%s' <==",capital[i]);
    }
  }
  printf("\n\n*****=====>> Your Score Is %d/25 <<=====*****",score);
  printf("\n\n\n///////////////=====>> Game Made By 'Ali Raza' <<=====////////////////");

getch();
}

If you
#include <ctype.h>

then you can use char = tolower(char), to change the answer the user gives, into it's lowercase equivalent, before you test it to see if it's the right answer.

Code:

len = strlen(answerFromUser);
for(i=0;i<len;i++)
   lowerstring[i]= answerFromUser[i];

Now test lowerstring with your answer ( using strcmp() ).

Convert the user's answer string into lower case. And have your capital list also in lower case(as you have already had in capital array). Now you easily can compare both strings by strcmp() function.