Math equation help!!

This is a discussion on Math equation help!! within the C Programming forums, part of the General Programming Boards category; Code: #include <stdio.h> #include <math.h> int main () { float pr ; float ir; int yrs; int comp; double future_value; ...

  1. #1
    Registered User
    Join Date
    Sep 2011
    Posts
    7

    Math equation help!!

    Code:
    #include <stdio.h>
    #include <math.h>
    
    int main ()
    {
    
    float pr;
    float ir;
    int yrs;
    int comp;
    double future_value;
    
    printf("Enter your amount invested (principle).\n");
    scanf("%f", &pr);
    printf("Enter your interest rate.\n");
    scanf("%f", &ir);
    printf("Enter your number of years.\n");
    scanf("%d", &yrs);
    printf("Enter your number of compounding periods.\n");
    scanf("%d", &comp);
    
    printf("Future value of investment: %f", future_value);
    
    future_value = pr * pow (1+ir/comp,yrs*comp);
    i don't see what i'm doing wrong but I always get 0.00000 for an answer. please if you could point me in the right direction thanks!

  2. #2
    Registered User TheBigH's Avatar
    Join Date
    May 2010
    Location
    Melbourne, Australia
    Posts
    426
    You're printing future_value before you calculate it.
    Code:
    while(!asleep) {
       sheep++;
    }

  3. #3
    Registered User
    Join Date
    Sep 2011
    Posts
    7
    ouch lol thanks

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