#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char    format[128];    // internal printf format string
int     colors[] = {33/*yellow*/, 32/*green*/, 31/*red*/, 0/*black*/};

int
output(int clr, const char *fmt, ...) {
        va_list         ap;             // variable arguments list
        double          argd;           // double from argument list
        int             argi;           // int from argument list
        const char *    args;           // pointer to string from argument list
        char            cc;             // conversion character from fmt
        int             rc = 0;         // return code

        va_start(ap, fmt);
        cc = fmt[strlen(fmt) - 1];
        snprintf(format, sizeof(format), "\e[%dm%s\e[0m", colors[clr], fmt);
        switch(cc) {
        case 'd':       argi = va_arg(ap, int);
                        printf(format, argi);
                        break;
        case 'f':       argd = va_arg(ap, double);
                        printf(format, (float)argd);
                        break;
        case 's':       args = va_arg(ap, const char *);
                        printf(format, args);
                        break;
        default:        rc = 1;
                        break;
        }
        va_end(ap);
        return(rc);
}

int
main(int argc, char *argv[]) {
        int     APM;    // input APM
        float   AMBPM;  // input AMBPM
        int     Count;  // input count
        FILE    *fp;    // Input file pointer
        char    Hour[3];// input hour
        float   MBytes; // input MBytes
        int     n;      // # items read from input line

        if((fp = fopen(argc > 1 ? argv[1] : "file", "r")) == NULL) {
                snprintf(format, sizeof(format), "%s: fopen(%s) failed",
                        argv[0], argc > 1 ? argv[1] : "file");
                perror(format);
                exit(1);
        }
        printf("Hour Count APM AMBPM  MBytes\n");
        printf("----+-----+---+-----+-------\n");
        while((n = fscanf(fp, "%2s,%d,%d,%f,%f\n",
                Hour, &Count, &APM, &AMBPM, &MBytes)) != EOF) {
                output(0, "%4s", Hour);
                output(3, " %5d", Count);
                output(1, " %3d", APM);
                output(2, " %5.2f", AMBPM);
                output(3, " %7.2f", MBytes);
                printf("\n");
        }
        exit(0);
}

00,485,8,0.64,38.45
01,511,9,0.06,3.51
02,517,9,0.07,4.43

Hour Count APM AMBPM  MBytes
----+-----+---+-----+-------
  00   485   8  0.64   38.45
  01   511   9  0.06    3.51
  02   517   9  0.07    4.43