# I need help!!!

 Jagan Dwarampudi · January 9, 2015 It's my 'C' code to find Simple and Compound Interest but it says ERROR. Please help me Boston. This is my code and it's not full.#include #include int main(){    int SI, CI, principal, amount, time, rate;    char decision;    printf("Calculate Your Simple or Compound Interest !!! \n\n");    printf("\nWhat is the Principal Amount? \n");    scanf(" %d", &principal);    printf("\nWhat is the Time Period? \n");    scanf(" %d", &time);    printf("\nWhat is the Rate of interest? \n");    scanf(" %d", &rate);    printf("\nWhich type of intrest? \n");    scanf(" %s", decision);    if( decision == simple ) {        SI = (principal * time * rate) / 100;        amount = SI + principal;        printf("\n Your SI is = Rs.%d \n", SI);        printf("\n Your total Amount is = Rs.%d \n", amount);    }    return 0;}

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 c student · January 26, 2015 i'm assuming that's k&r's book.  what errors are you getting? Marek Ďurkovič · January 25, 2015 Hello guys, I just wanted a little help; I bought a book "C Programming language" and codes there dont work in Code::Blocks...It always finds some error and I don't know how to deal with that...Is it problem when it is ANSI C99? I don't know what to do, because I'm newbie, I searched Google a lot but I didn't find my answer. If you know what is wrong, I would appriciate help :-) Thank you. c student · January 9, 2015 you have quite a few errors which need to be fixed...your floating point numbers are declared as integers, meaning they will round to the nearest integer.  any variable which may contain a floating point number has to be declared as float or double.  their respective conversion should be %f for float, or %lf for double.double SI, amount, rate;your string variable decision is of type char (one character).  it can be fixed by making it an array and then scanning it in:char decision[10]; // 10 must include the null terminator as well as the stringfgets (decision, 9, stdin); // scanning it in with max 9 characters to prevent buffer overflowswhen you compare strings, you cannot compare them directly as you have attempted.  try using strcmp() located in the string.h header file:if (strcmp (decision, "simple") == 0) { /* your code here */ }
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## C

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