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What is the output of the following program?

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2 votes
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#include <stdio.h>
int gsum(int *a,int n)
{
    if(n<=0)
    return 0;
    else
    {
        if(*a%2==0)
        return *a+gsum(a+1,n-1);
        else
        return *a-gsum(a+1,n-1);
    }
}
int main(void) {
// your code goes here
int a[]={12,7,13,4,11,6};
printf("%d",gsum(a,6));
return 0;
}
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2 Answers

Best answer
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5 votes
It will executed from last . Answer will be 15

12+gsum(a+1,5) 12+3=15

        |

      7-gsum(a+1,4) =7-4=3

             |

          13-gsum(a+1,3) =13-9=4

                 |

              4+gsum(a+1,2) =4+5=9

                    |

                 11-gsum(a+1,1) =11-6=5

                         |

                      6+gsum(a+1,0) =6+0=6

                            |

                           0
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