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42 lines
477 B
C
42 lines
477 B
C
/*
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* Prime number generator. It prints on stdout the next prime number
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* higher than the number specified as argv[1].
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*/
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#include <stdio.h>
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#include <math.h>
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main(argc, argv)
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int argc;
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char *argv[];
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{
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double i, j;
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int f;
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if (argc < 2)
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{
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exit(1);
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}
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i = atoi(argv[1]);
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while (i++)
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{
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f=1;
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for (j=2; j<i; j++)
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{
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if ((i/j)==floor(i/j))
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{
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f=0;
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break;
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}
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}
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if (f)
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{
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printf("%.0f\n", i);
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exit(0);
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}
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}
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}
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