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lines: add null check after opening infile

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This commit is contained in:
Robert Preston
2026-07-02 09:37:13 +10:00
parent b826126635
commit a58f5db5a3
1 changed files with 5 additions and 0 deletions
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5
c_programming/files/lines.c
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@@ -21,6 +21,11 @@
int main(void) int main(void)
{ {
FILE* infile = fopen("lines.txt", "r"); FILE* infile = fopen("lines.txt", "r");
if (infile == NULL)
{
perror("Failed to open in.txt");
return 1;
}
char buf[SIZE]; char buf[SIZE];
while (fgets(buf, sizeof buf, infile) != NULL) while (fgets(buf, sizeof buf, infile) != NULL)