array_fileIO_vs.c

#include<stdio.h>

int main()
{
    FILE* fpoint;

    float A[4];
    float L[4] = { 1.7,2.3,4.6,7.8};
    float W[4] = { 5.2,4.1,1.6,6.8 };

    fopen_s(&fpoint, "I:\\test\\calculation.dat", "a");

    for (int i = 0; i < 4; i++)
    {
        A[i] = L[i] * W[i];
        printf("\n%d L=%0.2f W=%0.2f A=%0.2f",i+1, L[i], W[i], A[i]);
        fprintf_s(fpoint, "\n%d L=%0.2f W=%0.2f A=%0.2f",i+1, L[i], W[i], A[i]);
    }




    fclose(fpoint);



    return 0;
}