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Add a function prototype for the function sumNum. # include using namespace sted; int main
(void) { float val; float amount; int n; cin >> val >> n; sumNum (amount, val, n); cout
Solution
Prototype of function :
In function concept prototype declaration is necessary in order to provide information to the
compiler about function, about return type, parameter list and function name etc.
Program :
# include<iostream .h >
using namespace std;
float sumNum(float,float, int);
/* prototype for the function sumNum it accept the sum value which is a float value and
parameter list mentioned, i.e. float,float, int */
int main (void) //main function
float amount;
int n;
cin>>val>>n; // Accept the value
sumNum(amount,val,n); // Calling function
cout<<amount<<end1;
}
void sumNum(float &sum, float x,int n); // Called function
{
int i;
sum=0.0; //Intilise the sum value to zero.
for(i=1;i<=n;i++)
{
sum=sum+i*x; // calculate the sum
}
return sum; // Here we return sum value
}

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Add a function prototype for the function sumNum- # include using nam.docx

  • 1. Add a function prototype for the function sumNum. # include using namespace sted; int main (void) { float val; float amount; int n; cin >> val >> n; sumNum (amount, val, n); cout Solution Prototype of function : In function concept prototype declaration is necessary in order to provide information to the compiler about function, about return type, parameter list and function name etc. Program : # include<iostream .h > using namespace std; float sumNum(float,float, int); /* prototype for the function sumNum it accept the sum value which is a float value and parameter list mentioned, i.e. float,float, int */ int main (void) //main function float amount; int n; cin>>val>>n; // Accept the value sumNum(amount,val,n); // Calling function cout<<amount<<end1; } void sumNum(float &sum, float x,int n); // Called function
  • 2. { int i; sum=0.0; //Intilise the sum value to zero. for(i=1;i<=n;i++) { sum=sum+i*x; // calculate the sum } return sum; // Here we return sum value }