20 lines
369 B
C
20 lines
369 B
C
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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void fallback_print_usage() {
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printf("Usage: ./sqrt number\n");
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printf("Example: ./sqrt 2\n");
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exit(0);
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}
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void print_sqrt(double number) { printf("%.8lf\n", sqrt(number)); }
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int main(int argc, char *argv[]) {
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if (argc != 2) {
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fallback_print_usage();
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}
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print_sqrt(atof(argv[1]));
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return 0;
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}
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