C Exercises: Converts kilometers per hour to miles per hour

Last update on July 29 2025 12:53:44 (UTC/GMT +8 hours)

4. Kilometers per Hour to Miles per Hour Conversion

Write a C program that converts kilometers per hour to miles per hour.

Pictorial Presentation:

C Input Output: Converts kilometers per hour to miles per hour

Sample Solution:

C Code:

#include <stdio.h>     // Include the standard input/output header file.

float kmph;              /* kilometers per hour */
float miph;              /* miles per hour (to be computed) */
char  line_text[50];      /* a line from the keyboard */

int main()
{
printf("Input kilometers per hour: ");   // Prompt the user to input kilometers per hour.
fgets(line_text, sizeof(line_text), stdin);   // Read a line of input from the user and store it in 'line_text'.
sscanf(line_text, "%f", &kmph);   // Convert the input to a float and store it in 'kmph'.

miph = (kmph * 0.6213712);   // Convert kilometers per hour to miles per hour.
printf("%f miles per hour\n", miph);   // Print the result in miles per hour.

return(0);   // Return 0 to indicate successful execution of the program.
}

Sample Output:

Input kilometers per hour: 15                                                                                 
9.320568 miles per hour

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to convert km/hr to miles/hr and vice versa, allowing the user to select the conversion direction.
Write a C program to convert an array of speeds from km/hr to miles/hr and display the maximum speed in miles/hr.
Write a C program to convert km/hr to miles/hr and round the result to the nearest tenth.
Write a C program to perform speed conversion from km/hr to miles/hr with robust error handling for non-numeric inputs.

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