27 lines
512 B
C++
27 lines
512 B
C++
#include <fstream>
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#include <iostream>
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int main()
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{
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std::ifstream input("filename.txt", std::ios_base::binary);
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if (!input)
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{
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std::cerr << "error: can't open file\n";
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return -1;
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}
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size_t count[256];
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std::fill_n(count, 256, 0);
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for (char c; input.get(c); ++count[uint8_t(c)]) // process input file
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; // empty loop body
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for (size_t i = 0; i < 256; ++i)
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{
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if (count[i] && isgraph(i)) // non-zero counts of printable characters
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{
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std::cout << char(i) << " = " << count[i] << '\n';
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}
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}
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}
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