Question

Write C code that contains a function called triangle_generator that outputs a triangle wave at a specified frequency (in hertz) using a specified sample rate (in hertz), and for a specified time duration (in seconds). These parameters are float type. The output you generate are floating point numbers between -1 and 1, one number per output line. The math trig functions in C use radians while all the specifications here are in hertz (cycles per second). One hertz is 2*Pi radians.

Answer 1

The required answer is given below in case of any doubts you can ask me in comments.

Explanation:

main.c

#include<stdio.h>
#include<math.h>


// prototype
float triangle_generator(float frequency, float sample_rate, float timeDuration);


// driver function.
int main()
{
    // variable declaration
    float frequency, sampleRate, timeDuration;
    // To take inputs from the user
    printf("Enter Frequency, Sample Rate and Time separated by space:\n"); 
    scanf("%f%f%f",&frequency, &sampleRate, &timeDuration);
    // getting value.
    float res = triangle_generator(frequency, sampleRate, timeDuration); 
    // Displaying value.
    printf("Result = %f", res);
    return 0;
}


// Function for finding the sin value
float triangle_generator(float freq, float sampleRate, float timeDuration) 
{
    float temp = sampleRate/freq; // cycles per second
    float x = sin((2*3.1414)/temp*timeDuration); 
    return x;
}

Output: