110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include <ctype.h>
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int main(){
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// Declare Variables
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// Float values for calculations
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float bmi, weight, height, mostellar, duBois, boyd, lifeExpect;
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// Int values to store the result of the scanf fucntion
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int weightResult, heightResult;
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// Char to store the gender with max length of 7 and a line string for formatting
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char gender[7];
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char line[] = "********************************";
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// Display Program Purpose
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printf("%s%s%s*\n", line, line, line);
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printf("*\tThis program will calculate your BMI, Life Expectancy, and BSA(mulitple methods)\t*\n");
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printf("*\twith just your weight(kg), height(cm), and gender.\t\t\t\t\t*\n");
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printf("%s%s%s*\n", line, line, line);
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// Read in weight, height, and gender from user
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printf("Please enter your weight(kg): ");
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weightResult = scanf("%f", &weight);
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while (weight <= 0 || weightResult != 1) {
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while (getchar() != '\n');
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if (weight <= 0) {
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printf("Bad Value: Weight must greater than 0! fmt: XX.X\n");
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} else {
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printf("Bad Value: Please enter a decimal input! fmt: XX.X\n");
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}
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printf("Please re-enter your weight(kg): ");
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weightResult = scanf("%f", &weight);
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}
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printf("Please enter your height(cm): ");
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heightResult = scanf("%f", &height);
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while (height <= 0 || heightResult != 1) {
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while (getchar() != '\n');
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if (height <= 0) {
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printf("Bad Value: Height must greater than 0! fmt: XX.X\n");
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} else {
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printf("Bad Value: Please enter a decimal input! fmt: XX.X\n");
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}
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printf("Please re-enter your height(cm): ");
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heightResult = scanf("%f", &height);
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}
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// Make sure correct values for gender are entered
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while (1) {
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// Read in gender from user
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printf("Please enter your gender(male or female): ");
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scanf("%s", gender);
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// Loop through all chars in gender and convert to lower case
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for (int i = 0; i < strlen(gender); i++) {
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gender[i] = tolower(gender[i]);
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}
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// Check if gender is valid
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if (!(strcmp("male", gender)) || !(strcmp("female", gender))) {
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break;
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} else {
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printf("Bad value: Please enter either male or female\n");
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}
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}
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// Calculate the BMI
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bmi = 10000 * (weight / pow(height, 2));
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// Calculate the BSA(Mosteller's)
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mostellar = sqrt((height * weight) / 3600);
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// Calculate the BSA(Dubois)
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duBois = (0.20247 * pow((height / 100), 0.725)) * pow(weight, 0.425);
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// Calculate the BSA(boyd)
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boyd = (0.0003207 * pow(height, 0.3)) * pow((1000 * weight), (0.6721 - (0.0188 * log10(weight))));
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// Check if overweight and gender to select correct life expectancy message
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// Only need to check one since the input screens to just two options
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if (strcmp("male", gender)) {
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if (bmi > 25) {
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lifeExpect = 81.4;
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} else {
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lifeExpect = 83.5;
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}
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} else {
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if (bmi > 25) {
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lifeExpect = 77.3;
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} else {
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lifeExpect = 79.4;
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}
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}
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// Display values and output
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printf("For a %s with weight(kg) of %.1fkg and height(cm) of %.1fcm\n", gender, weight, height);
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printf("You have a BMI of %.1f and a life expectancy of %.1f years\n", bmi, lifeExpect);
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printf("You also have a BSA calculated using\n");
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printf(" - Mosteller's:\t%.3f\n", mostellar);
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printf(" - DuBois:\t\t%.3f\n", duBois);
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printf(" - Boyd:\t\t%.3f\n", boyd);
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return 0;
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}
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