Thread: function with loop within a loop

Thanks for responding. To clarify my goal, I want to add the sum of exponent values. So If the user enters
1 for starting value
3 for ending value
and 2 for exponent, the table would look like:

value____value squared
1___________1
2___________4
3___________9
----------------
___________14 = sum of squared values

Thanks for responding. I have two questions.

1) s

um+=value_squared //how does this += work

2) Why am I short 1 value when summing the exponents when I run the code?

Code:

#include<stdio.h>#include<math.h>


int power_table(int startingint, int endingint, int exponent, int sumvalue); //fucntion prototype


int main()
{ 
    char line[10];
    int startingint = 1;
    int endingint = 1;
    int exponent = 1;
    int x = 1;
    int sumvalue = 1;


    printf("Enter the starting integer value:\n");
    fgets(line, sizeof(line), stdin);
    sscanf(line, "%d", &startingint);


    printf("Enter the ending integer value:\n");
    fgets(line, sizeof(line), stdin);
    sscanf(line, "%d", &endingint);
    
    printf("Enter the exponent:\n");
    fgets(line, sizeof(line), stdin);
    sscanf(line, "%d", &exponent);
    
    power_table(startingint, endingint, exponent, sumvalue);
}


int power_table(int startingint, int endingint, int exponent, int sumvalue)
{
    int x = 1;
    int sumvalue = 1;
    printf("x   x^n     sum\n");
    printf("---------------\n");
    
    for(x=startingint; x<=endingint; x++)
    {
        
    startingint = x;
    exponent = pow(startingint, x);
    printf("%d   %d\n", startingint, exponent,);
    sumvalue+=exponent;
        
    }
    printf("The sum of the exponent values = %d\n", sumvalue);
}

Line 37 should give you an error because you are re declaring sumvalue.. Aside from that you should also set sumvalue = 0...
sumvalue+=exponent works just like this sumvalue= sumvalue+exponent the onlly difference is it is shorter to write

Sorry for the double post but you also want to change this

Code:

startingint = x;
    exponent = pow(startingint, x);
    printf("%d   %d\n", startingint, exponent,);
    sumvalue+=exponent;

exponent should go into the pow function like this aVariable=(int) pow(startingint, exponent);