Simplified an if statement.
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@ -54,7 +54,7 @@ int main(int argc, char **argv) {
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} else {
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int i = 0;
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while(argv[1][i] != '\0') { // While argv[1][i] is not equal to NULL (can't use NULL for pointers)
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if(isdigit(argv[1][i] - '0') != 0) { // if argv[1][i] is not a number between 0 and 9
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if(isdigit(argv[1][i] - '0')) { // if argv[1][i] is not a number between 0 and 9
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printf("You did not specify a number.\n");
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printf("Usage: %s [num_trials]\n", argv[0]);
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return 1;
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