#include<stdio.h>
#include<stdlib.h>
int main(int argc, char *argv[]) {
FILE *fp;
char line[64] = {0};
int sum = 0;
if (argc < 2) {
return EXIT_FAILURE;
}
fp = fopen(argv[1], "r");
while (fgets(line, 64, fp)) {
sum += atoi(line);
}
fclose(fp);
printf("sum is\t%d\n", sum);
return EXIT_SUCCESS;
}