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#include<stdio.h>
#include<stdlib.h>
#include<math.h>
 
/* prototype declaration */
long fact(int);
double computeSine(double x,  n);
 
/* Main Function */
int main(int argc, char **argv) {
 
  if(argc != 3) {
    fprintf(stderr, "Usage: %s x n\n", argv[0]);
    exit(1);
  }
 
  double result = 0.0;
  double x = atof(argv[1]);
  n = atoi(argv[2]);
 
  result = computeSine(x, n , 10);
  printf("sin(%lf) = %d\n", x, result);
  return 0;
}
 
 
 
/* Factorial Function */
long fact(int n) {
  long result = 1, i;
  for(i=2; i<=n; i++) {
    result *= i;
  }
  return result;
}
 
/* compute sin(x) using a taylor series out to n terms */
double computeSine(double x, int n){
 
  double result = 0.0  
  int i=0;
  for(i=0; i<n; i++){
    double term = pow(-1,i) * (pow(x, 2*i+1)/fcat(2*i+1));
    Result += term;
  }
  return ;
 
}

prog.c:7:31: error: unknown type name 'n'
 double computeSine(double x,  n);
                               ^
prog.c: In function 'main':
prog.c:19:3: error: 'n' undeclared (first use in this function)
   n = atoi(argv[2]);
   ^
prog.c:19:3: note: each undeclared identifier is reported only once for each function it appears in
prog.c:21:12: warning: implicit declaration of function 'computeSine' [-Wimplicit-function-declaration]
   result = computeSine(x, n , 10);
            ^
prog.c:22:10: warning: format '%d' expects argument of type 'int', but argument 3 has type 'double' [-Wformat=]
   printf("sin(%lf) = %d\n", x, result);
          ^
prog.c: At top level:
prog.c:38:8: error: conflicting types for 'computeSine'
 double computeSine(double x, int n){
        ^
prog.c:21:12: note: previous implicit declaration of 'computeSine' was here
   result = computeSine(x, n , 10);
            ^
prog.c: In function 'computeSine':
prog.c:41:3: error: expected ',' or ';' before 'int'
   int i=0;
   ^
prog.c:42:7: error: 'i' undeclared (first use in this function)
   for(i=0; i<n; i++){
       ^
prog.c:43:46: warning: implicit declaration of function 'fcat' [-Wimplicit-function-declaration]
     double term = pow(-1,i) * (pow(x, 2*i+1)/fcat(2*i+1));
                                              ^
prog.c:44:5: error: 'Result' undeclared (first use in this function)
     Result += term;
     ^
prog.c:46:3: warning: 'return' with no value, in function returning non-void
   return ;
   ^
prog.c:40:10: warning: unused variable 'result' [-Wunused-variable]
   double result = 0.0  
          ^

Standard output is empty