51 lines
1.4 KiB
Plaintext
51 lines
1.4 KiB
Plaintext
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// Public domain / CC0. Use freely for any purpose. RoyR 2026
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// types.cm - Type casting and different integer sizes
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// Demonstrates: different integer types, casting, overflow behavior
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void printf(uint8 *fmt);
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int32 main(void) {
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// Different integer sizes
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uint8 byte_val = 255;
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uint16 word_val = 65535;
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uint32 dword_val = 4294967295;
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int8 sbyte_val = -128;
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int16 sword_val = -32768;
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int32 sdword_val = -2147483648;
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printf("Unsigned types:\n");
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printf(" uint8: %d\n", byte_val);
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printf(" uint16: %d\n", word_val);
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printf(" uint32: %u\n", dword_val);
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printf("\nSigned types:\n");
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printf(" int8: %d\n", sbyte_val);
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printf(" int16: %d\n", sword_val);
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printf(" int32: %d\n", sdword_val);
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// Type casting
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printf("\nType casting:\n");
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int32 large = 1000;
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uint8 small = (uint8)large;
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printf(" (uint8)1000 = %d (truncated to 8 bits)\n", small);
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int32 value = 298;
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uint8 truncated = (uint8)value;
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printf(" (uint8)298 = %d (298 %% 256 = 42)\n", truncated);
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// Sign extension
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int8 neg = -1;
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int32 extended = neg;
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printf("\nSign extension:\n");
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printf(" int8(-1) extended to int32: %d\n", extended);
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// Unsigned to signed
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uint8 unsigned_val = 200;
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int8 signed_val = (int8)unsigned_val;
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printf("\nUnsigned to signed:\n");
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printf(" (int8)200 = %d (interpreted as signed)\n", signed_val);
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return 0;
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}
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