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#define round(x) x >= 0.0 ? (int)(x + 0.5) : ((x - (double)(int)x) >= -0.5 ? (int)x : (int)(x - 0.5)) |
Example:
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#include <stdio.h> #define round(x) x >= 0.0 ? (int)(x + 0.5) : ((x - (double)(int)x) >= -0.5 ? (int)x : (int)(x - 0.5)) void main(void){ float f1 = 3.14, f2 = 6.5, f3 = 7.99; int r1, r2, r3; r1 = round(f1); r2 = round(f2); r3 = round(f3); printf("r1 = %d\nr2 = %d\nr3 = %d\n", r1, r2, r3); } |
The console output is:
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r1 = 3 r2 = 7 r3 = 8 |