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#include <stdio.h>
int main()
{
char str[20] = "testtesttesttesttes";
FILE *fp = fopen("1.txt", "w+");
if (fp==0) {
printf("can't open file\n");
return 0;
}
fwrite(str, sizeof(char)*20, 1, fp);
fclose(fp);
return 0;
}
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