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make isvalidnumber a function

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This commit is contained in:
lily 2025-06-17 22:31:03 +10:00
parent c04ea85a1a
commit 8ed0bef631
1 changed files with 28 additions and 30 deletions
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58
src/agg.c
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@ -5,7 +5,34 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <math.h> #include <math.h>
int isvalidnumber(char entered []) {
int valid = 1;
for (int i = 0; i < strlen(entered); i++) {
switch (entered[i]) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.':
case '-':
break;
default:
valid = 0;
break;
}
}
return valid;
}
int main(void) { int main(void) {
srand(time(NULL)); srand(time(NULL));
char *username = getenv("USER"); char *username = getenv("USER");
@ -66,37 +93,8 @@ int main(void) {
questioncount++; questioncount++;
scanf ("%s", entered); scanf ("%s", entered);
int valid = 1;
for (int i = 0; i < strlen(entered); i++) {
switch (entered [i]) {
case '0':
break;
case '1':
break;
case '2':
break;
case '3':
break;
case '4':
break;
case '5':
break;
case '6':
break;
case '7':
break;
case '8':
break;
case '9':
break;
case '.':
break;
default:
valid = 0;
}
}
if (valid == 1) { if (isvalidnumber(entered)) {
sscanf (entered, "%g", &answer); sscanf (entered, "%g", &answer);
} else { } else {
printf ("Error! An invalid character was entered.\n"); printf ("Error! An invalid character was entered.\n");