Question

C Programming: Write a program that inputs two strings that represent floating-point values, convert the strings to double values. Calculate the sum,difference,and product of these values and print them.

int main(){
   // character string value array for user
   char stringValue[10];
  
   double sum=0.0;// initialize sum to store the results from 2 double values
  
   double difference=0.0; // initialize difference to store the results from 2 double values
  
   double product = 0.0; // intitialzie product to store the results from 2 double values
  
   int x; // initialize x for loop counter
  
   // loop 2 times from 1 to 2
   for(x=1;x<=2;x++){
      
       // prompt user to enter floating point string value
       printf("Enter the floating point string value:\t");
      
       // gets function to get string values
       scanf("%s",stringValue);
      
       // atof converts the string into double values
       sum+=atof(stringValue);
      
       difference -= atof(stringValue);
      
       product *= atof(stringValue);
      
      
   }// end for loop
  
   // Display sum,diffence, and product of 2 values entered from user
   printf("\nThe total of the two values entered is %f\n",sum);
  
   printf("The difference of the two values entered is %f\n",difference);
  
   printf("The product of the two values entered is %f\n",product);
  
   return 0;
  
}

Answer 1

#include <stdio.h>
#include <stdlib.h>

int main() {
    // character string value array for user
    char stringValue[10];

    double sum = 0.0;// initialize sum to store the results from 2 double values
    double difference = 0.0; // initialize difference to store the results from 2 double values
    double product = 1.0; // intitialzie product to store the results from 2 double values
    int x; // initialize x for loop counter

    // loop 2 times from 1 to 2
    for (x = 1; x <= 2; x++) {
        // prompt user to enter floating point string value
        printf("Enter the floating point string value:\t");
        // gets function to get string values
        scanf("%s", stringValue);
        // atof converts the string into double values
        sum += atof(stringValue);
        if (x == 1)
            difference = sum;
        else
            difference -= atof(stringValue);
        product *= atof(stringValue);
    }// end for loop

    // Display sum,diffence, and product of 2 values entered from user
    printf("\nThe total of the two values entered is %f\n", sum);
    printf("The difference of the two values entered is %f\n", difference);
    printf("The product of the two values entered is %f\n", product);
    return 0;
}