error occur during compilation a program

[ballpen1019]

can someone help me to check any problems in this program...i cant run my program..
/* calculate depreciation using one of three different methods */

#include <stdlib.h>
#include <stdio.h>
#include<ctype. h>
void SL (void);
void DDB (void);
void SYD (void);

main()
{

int n, N, year, choice = 0;
float val, value, deprec, tag;
char answer1 = 'Y', answer2 = 'Y';

while(toupper(a nswer1) != 'N')
{
system("CLS");

if(toupper(answ er2) != 'N')
{
printf("\nOrigi nal value: ");
scanf("%f", &value);
printf("Number of years: ");
scanf("%d", &N);
}
printf("\nMetho d: (1-SL 2-DDB 3-SYD) ");
scanf("%d", &choice);

val = value;
n = N;

switch(choice)
{
case 1:SL();break;
case 2:DDB();break;
case 3:SYD();break;
default:puts("i nvalid entry");
}


printf("\n\nAno ther calculation? [Y/N] ");
scanf("%1s", &answer1);
if(toupper(answ er1) != 'N')
{
printf("Enter a new set of data? [Y/N] ");
scanf("%1s", &answer2);
}

}


system("pause") ;
}

void SL (void)
{ int n, N, year, choice = 0;
float val, value, deprec, tag;
char answer1 = 'Y', answer2 = 'Y';

printf("\nStrai ght Line Method\n\n");
deprec = val/n;
for (year = 1; year <= n; year++)
{
val -= deprec;
printf("\nEnd of year %2d ", year);
printf("\nDepre ciation: %7.2f ", deprec);
printf("\nCurre nt value:%8.2f\n", val);
}

}
void DDB(void)
{
int n, N, year, choice = 0;
float val, value, deprec, tag;
char answer1 = 'Y', answer2 = 'Y';

printf("\nDoubl e Declining Balance Method\n\n");
for (year = 1; year <= n; year++)
{
deprec = 2*val/n;
val = deprec;
printf("End of year %2d ", year);
printf("Depreci ation: %7.2f ", deprec);
printf("Current value:%8.2f\n", val);
}
}
void SYD(void)
{ int n, N, year, choice = 0;
float val, value, deprec, tag;
char answer1 = 'Y', answer2 = 'Y';

printf("\nSum-of-the-Years\'-Digits method\n\n");
tag = val;
for (year = 1; year <= n; year++)
{
deprec = (n-year+1)*tag/(n*(n+1)/2);
val -= deprec;
printf("End of year %2d ", year);
printf("Depreci ation: %7.2f ", deprec);
printf("Current value:%8.2f\n", val);
}
}


thank you...

[newb16]

You, in fact, can. But the output loops forever. Because there is garbage in "n" variable in 'for' loop for year, that you can check by stepping in debugger or using debug print. And garbage is there because you place number of years into variable local to main() function and use local 'n' in other functions, that are not the same.