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Consequently, returning from main() is equivalent to calling exit(). Many compilers implement this behavior with something analogous to
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void _start(void) {
/* ... */
exit(main(argc, argv));
}
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#include <stdlib.h>
#include <stdio.h>
int write_data(void) {
char const *filename = "hello.txt";
FILE *f = fopen(filename, "w");
if (f == NULL) {
/* handle error */
}
fprintf(f, "Hello, World\n");
/* ... */
abort(); /* oops! data might not get written! */
/* ... */
return 0;
}
int main(void) {
write_data();
return 0;
}
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#include <stdlib.h>
#include <stdio.h>
int write_data(void) {
char const *filename = "hello.txt";
FILE *f = fopen(filename, "w");
if (f == NULL) {
/* handle error */
}
fprintf(f, "Hello, World\n");
/* ... */
exit(EXIT_FAILURE); /* writes data & closes f. */
/* ... */
return 0;
}
int main(void) {
write_data();
return 0;
}
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