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(answer1) != 'N')
{
system("CLS");

if(toupper(answer2) != 'N')
{
printf("\nOriginal value: ");
scanf("%f", &value);
printf("Number of years: ");
scanf("%d", &N);
}
printf("\nMethod: (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("invalid entry");
}


printf("\n\nAnother calculation? [Y/N] ");
scanf("%1s", &answer1);
if(toupper(answer1) != '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("\nStraight Line Method\n\n");
deprec = val/n;
for (year = 1; year <= n; year++)
{
val -= deprec;
printf("\nEnd of year %2d ", year);
printf("\nDepreciation: %7.2f ", deprec);
printf("\nCurrent 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("\nDouble Declining Balance Method\n\n");
for (year = 1; year <= n; year++)
{
deprec = 2*val/n;
val = deprec;
printf("End of year %2d ", year);
printf("Depreciation: %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("Depreciation: %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.