By looking at our program's variables before (then after) initialization, it just makes sense to take care of setting values as we design our code.
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It's OK that this code throws a warning at compile time. |
/* pgm13 source */
#include <stdio.h>
#include <string.h>
#define STRING_SIZE 9
int main(void) {
char data[STRING_SIZE];
int intval;
int x;
// neither variable 'data[]' or 'intval' have been initialized
// whatever shows up via 'printf()' is ARBITRARY at this point
printf("\nintval contains %d\n\n", intval);
for (x = 0; x < STRING_SIZE; x++)
printf("data[%d] holds '%c' (hexadecimal: %x)\n", x, data[x], data[x]);
// now we purposefully initialize our variables
strcpy(data, "ZEBRA");
intval = 443322;
printf("\nintval contains %d\n\n", intval);
for (x = 0; x < STRING_SIZE; x++)
printf("data[%d] holds '%c' (hexadecimal: %x)\n", x, data[x], data[x]);
printf("\n");
return(0);
}