Write a program to find the weighted average of a collection of numbers
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Source Code
#include <stdio.h>
int main()
{
float value, weight, sum = 0;
int index = 0;
char str[10];
printf("Calculation of weighted average\n");
do {
printf("enter value : ");
scanf ("%f", &value);
printf("enter weight in fraction : ");
scanf ("%f", &weight);
printf("effective value : %f considered.\n", value * weight);
sum += value * weight;
index++;
printf("current sum : %f and counts : %d\n", sum, index);
printf("Do you want to enter another value? ");
scanf ("%s", str);
} while(tolower(str[0]) == 'y');
sum /= index;
printf("weighted average = %f\n", sum);
return 0;
}
Output
Calculation of weighted average
enter value : 1
enter weight in fraction : 1.0
effective value : 1.000000 considered.
current sum : 1.000000 and counts : 1
Do you want to enter another value? yes
enter value : 2
enter weight in fraction : 0.5
effective value : 1.000000 considered.
current sum : 2.000000 and counts : 2
Do you want to enter another value? yes
enter value : 3
enter weight in fraction : 0.5
effective value : 1.500000 considered.
current sum : 3.500000 and counts : 3
Do you want to enter another value? no
weighted average = 1.166667
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