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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. double calcSoma(int n);
  5. long int fatorial(int n);
  6.  
  7. int main () {
  8.     int termos;
  9. do {
  10.     printf("Digite a qtd de termos (>= 5): ");
  11.     scanf("%d", &termos);
  12. }while(termos < 5);
  13.  printf("\nO somatorio para %d termos eh %e", termos, calcSoma(termos));
  14.  
  15. }
  16.  
  17. double calcSoma (int n){
  18.     double s = 1;
  19.     int i, numerador = 0, valFat = 1;
  20.     for (i = 0; i < n; i ++) {
  21.         numerador = numerador + 2;
  22.         valFat = valFat + 2; //numeros impares
  23.         s = s + (double)numerador/fatorial(valFat);
  24.     }
  25. return s;
  26. }
  27.  
  28. long int fatorial(int n){
  29.     long int fat = 0;
  30.     if (n == 0) {
  31.         return 1;
  32.     }else {
  33.         fat = n * (fatorial(n-1));
  34.     }
  35.     return fat;
  36. }
Success #stdin #stdout 0s 2116KB
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stdin
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5
stdout
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Digite a qtd de termos (>= 5): 
O somatorio para 5 termos eh 1.367879e+00
https://ideone.com/zCo9wj
language:
C99 (gcc 8.3)
created:
7 years ago
visibility:
public

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