#include <stdio.h>

int main(void)
{
    FILE* oFile;

    char c, fChar;
    int count = 0, i = 0;
    float percent;

    printf("Char: ");
    scanf("%c", &fChar);

    oFile = fopen("myfile.txt", "r");
    if(oFile == NULL)
    {
        printf("File not found");
        return 1;
    }

    while((c = fgetc(oFile)) != EOF)
    {
        if(c == fChar)
        {
            count++;
        }
        i++;
    }
    fclose(oFile);

    printf("\nLen = %d\nCount = %d\n", i, count);

    percent = ((float)count / (float)i) * 100;
    printf("Percent = %f", percent);

    getch();
    return 0;
}