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C Program To Program Create Table and Bar Chart Plot From Set Of Temperature Readings

#include #include #include #include #include /* Prototypes */ void get_temps(void); void table_view(void); void min_max(int num_vals, int vals[], int *min_val, int *max_val); float avg_temp(int num_vals, int vals[]); void graph_view(void); void save_temps(void); void read_temps(void); /* Global defines */ #define TRUE 1 #define READINGS 8 /* Global data structures */ int temps[READINGS]; int main(void) { clrscr(); while (TRUE) { printf("\nTemperature Plotting Program Menu\n"); printf("\tE - Enter temperatures for scratchpad\n"); printf("\tS - Store scratchpad to disk\n"); printf("\tR - Read disk file to scratchpad\n"); printf("\tT - Table view of current data\n"); printf("\tG - Graph view of current data\n"); printf("\tX - Exit the program\n"); printf("\nPress one of the above keys: "); switch (toupper(getche())) { case 'E': get_temps(); break; case 'S': save_temps(); break; case 'R': read_temps(); break; case 'T': table_view(); break; case 'G': graph_view(); break; case 'X': exit(0); } } } /* Function definitions */ void get_temps(void) { char inbuf[130]; int reading; printf("\nEnter temperatures, one at a time.\n"); for (reading = 0; reading < READINGS; reading++) { printf("\nEnter reading # %d: ", reading + 1); gets(inbuf); sscanf(inbuf, "%d", &temps[reading]); } } void table_view(void) { int reading, min, max; clrscr(); /* clear the screen */ printf("Reading\t\tTemperature(F)\n"); for (reading = 0; reading < READINGS; reading++) printf("%d\t\t\t%d\n", reading + 1, temps[reading]); min_max(READINGS, temps, &min, &max); printf("Minimum temperature: %d\n", min); printf("Maximum temperature: %d\n", max); printf("Average temperature: %f\n", avg_temp(READINGS, temps)); } void min_max(int num_vals, int vals[], int *min_val, int *max_val) { int reading; *min_val = *max_val = vals[0]; for (reading = 1; reading < num_vals; reading++) { if (vals[reading] < *min_val) *min_val = vals[reading]; else if (vals[reading] > *max_val) *max_val = vals[reading]; } } float avg_temp(int num_vals, int vals[]) { int reading, total = 0; for (reading = 0; reading < num_vals; reading++) total += vals[reading]; return (float) total/reading; /* reading equals total vals */ } void graph_view(void) { int graphdriver = DETECT, graphmode; int reading, value; int maxx, maxy, left, top, right, bottom, width; int base; /* zero x-axis for graph */ int vscale = 1.5; /* value to scale vertical bar size */ int space = 10; /* spacing between bars */ char fprint[20]; /* formatted text for sprintf */ initgraph(&graphdriver, &graphmode, "..\\bgi"); if (graphresult() < 0) /* make sure initialized OK */ return; maxx = getmaxx(); /* farthest right you can go */ width = maxx /(READINGS + 1); /* scale and allow for spacing */ maxy = getmaxy() - 100; /* leave room for text */ left = 25; right = width; base = maxy / 2; /* allow for neg values below */ for (reading = 0; reading < READINGS; reading++) { value = temps[reading] * vscale; if (value > 0) { top = base - value; /* toward top of screen */ bottom = base; setfillstyle(HATCH_FILL, 1); } else { top = base; bottom = base - value; /* toward bottom of screen */ setfillstyle(WIDE_DOT_FILL, 2); } bar(left, top, right, bottom); left +=(width + space); /* space over for next bar */ right +=(width + space); /* right edge of next bar */ } outtextxy(0, base, "0 -"); outtextxy(10, maxy + 20, "Plot of Temperature Readings"); for (reading = 0; reading < READINGS; reading++) { sprintf(fprint, "%d", temps[reading]); outtextxy((reading *(width + space)) + 25, maxy + 40, fprint); } outtextxy(50, maxy+80, "Press any key to continue"); getch(); /* Wait for a key press */ closegraph(); } void save_temps(void) { FILE * outfile; char file_name[40]; printf("\nSave to what filename? "); while (kbhit()); /* "eat" any char already in keyboard buffer */ gets(file_name); if ((outfile = fopen(file_name,"wb")) == NULL) { perror("\nOpen failed! "); return; } fwrite(temps, sizeof(int), READINGS, outfile); fclose(outfile); } void read_temps(void) { FILE * infile; char file_name[40] = "test"; printf("\nRead from which file? "); while (kbhit()); /* "eat" any char already in keyboard buffer */ gets(file_name); if ((infile = fopen(file_name,"rb")) == NULL) { perror("\nOpen failed! "); return; } fread(temps, sizeof(int), READINGS, infile); fclose(infile); }

Sample Input :

Temperature Plotting Program Menu
        E - Enter temperatures for scratchpad
        S - Store scratchpad to disk
        R - Read disk file to scratchpad
        T - Table view of current data
        G - Graph view of current data
        X - Exit the program

Press one of the above keys: E

 

Enter reading # 2: 34

Enter reading # 3: 42

Enter reading # 4: 38

Enter reading # 5: 42

Enter reading # 6: 40

Enter reading # 7: 39

Enter reading # 8: 28

Temperature Plotting Program Menu
        E - Enter temperatures for scratchpad
        S - Store scratchpad to disk
        R - Read disk file to scratchpad
        T - Table view of current data
        G - Graph view of current data
        X - Exit the program

Press one of the above keys: s
Save to what filename?

 
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