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2010-05-25T14:20:56Z

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2010-05-25T10:22:37Z

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==Average the items in a 5 element array==

<source lang="cpp">
#include <stdio.h>

int main() {
float data[5];
float total;
float average;

data[0] = 3.0;
data[1] = 2.0;
data[2] = 4.0;
data[3] = 8.0;
data[4] = 2.0;
total = data[0] + data[1] + data[2] + data[3] + data[4];
average = total / 5.0;
printf("Total %f Average %f\n", total, average);
return (0);
}

</source>

==Calculation between int and float==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
int i;
float f;
i = 10;
f = 2.25;
printf("%f", i * f);
return 0;
}

</source>

==Calculation: float==

<source lang="cpp">
#include <stdio.h>
float area(int width, float height) {
return (width * height);
}
int main()
{
float size = area(3.0, 20);
printf("Area is %f\n", size);
return (0);
}

</source>

==Computes the accuracy of the floating point numbers in storage and calculations==

<source lang="cpp">
#include <stdio.h>
int main()
{
float floatNumber1, floatNumber2;
float result;
int counter;
floatNumber1 = 1.0;
floatNumber2 = 1.0;
counter = 0;
while (floatNumber1 + floatNumber2 != floatNumber1) {
++counter;
floatNumber2 = floatNumber2 / 10.0;
}
printf("%2d digits accuracy in calculations\n", counter);
floatNumber2 = 1.0;
counter = 0;
while (1) {
result = floatNumber1 + floatNumber2;
if (result == floatNumber1)
break;
++counter;
floatNumber2 = floatNumber2 / 10.0;
}
printf("%2d digits accuracy in storage\n", counter);
return (0);
}

</source>

==Do calculation in printf: float value ==

<source lang="cpp">
#include <stdio.h>
int main(void)
{
printf("Number of seconds in a year: ");
printf("%f", 60.0 * 60.0 * 24.0 * 365.0);
return 0;
}

</source>

==Floating Point Input==

<source lang="cpp">
#include <stdio.h>
void main()
{
float fp1 = 1.0f;
float fp2 = 20.0f;
float fp3 = 440.0f;
int k = 0;
k = scanf("%f %f %f", &fp1, &fp2, &fp3);
printf("\nReturn value = %d", k);
printf("\nfp1 = %f fp2 = %f fp3 = %f\n", fp1, fp2, fp3);
}

</source>

==Output float==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
printf("%f", 2309);
return 0;
}

</source>

==Print i and i/2 with fractions==

<source lang="cpp">
#include <stdio.h>
int main(void)
{
int i;
for(i=1; i<=100; ++i)
printf("%d / 2 is: %f\n", i, (float) i /2);
return 0;
}

</source>

==Read user input: float==

<source lang="cpp">
#include <stdio.h>
void main()
{
float diameter = 0.0f; /* The diameter of the table */
printf("Input the diameter of the table:");

scanf("%f", &diameter); /* Read the diameter from the keyboard */

printf("\nThe input is %f\n", diameter);
}

</source>

==Save calculation result into a float variable==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
float f;
f = 10 / 3;
printf("%f", f);
return 0;
}

</source>

==Use float as for loop control variable==

<source lang="cpp">
#include <stdio.h>
int main(void)
{
double f;
for(f = 1.0; f < 1.0e+10; f = f*10)
printf("%g ", f);
return 0;
}

</source>

==Use scanf and printf to read and write float value in console==

<source lang="cpp">
#include <stdio.h>
int main(void)
{
float a, b;
printf("Enter two numbers: ");
scanf("%f", &a);
scanf("%f", &b);
printf(" sum = %f.", a + b);
return 0;
}

</source>

==Working with float ==

<source lang="cpp">
#include <stdio.h>
int main(void)
{
float weight;
printf("Enter your weight: ");
scanf("%f", &weight);
printf("weight on the moon: %f", weight * 0.17);
return 0;
}

</source>

==Work with int and float==

<source lang="cpp">

#include <stdio.h>
int main(void)
{
int num;
float f;
printf("Enter an integer: ");
scanf("%d", &num);
printf("Enter a floating point number: ");
scanf("%f", &f);
printf("%d ", num);
printf("%f", f);
return 0;
}

</source>

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в 14:20, 25 мая 2010

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