42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#include <cassert>
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#include <cstring>
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#include <iostream>
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constexpr void crop(int num_strings, char** strings, int characters_cropped);
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int main(const int argc, char** argv)
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{
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/* crop the first two letters of each input argument,
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* by jumping from index 0 to index 2
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*/
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const int jump_to_index = 2;
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/* crop all of the strings in argv, except the one with index 0;
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* note that argv[0] is always the program's name.
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* only the argv[i] with i > 0 are genuine command-line arguments.
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*/
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crop(argc-1, argv+1, jump_to_index);
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for(int i = 1; i < argc; i++)
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std::cout << "Argument no. " << i
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<< " was cropped to \"" << argv[i] << "\".\n";
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}
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/* implementation that "crops" a string by incrementing it, so that
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* it effectively begins <characters_cropped> characters further ahead.
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*/
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constexpr void crop(int num_strings, char** strings, const int characters_cropped)
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{
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assert(characters_cropped >= 0);
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for(int i = 0; i < num_strings; i++)
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if(strlen(strings[i]) >= characters_cropped)
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strings[i] += characters_cropped;
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else strings[i] += strlen(strings[i]);
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}
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/* make and try executing:
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* ./wildptr-fixed ABCDE FGHIJ KLMNO
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* ./wildptr-fixed ABCDE FGHI JKL MN O
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*/
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