c言語のランダム生成器
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#include <stdio.h> #include <stdlib.h> #include <time.h> void init(){ srand(time(NULL)); } double getRandomDouble(){ return rand() * 1.0 / RAND_MAX; } int getRandomInt(int min, int max){ if(max < min){ return max; } double d = getRandomDouble(); int randomOffset = (int)(d * (max - min + 1)); return min + randomOffset; } int main(){ init(); int n; int intMin = -3; int intMax = 7; int times = 10000; int min = 0; int max = 0; for(int i=0; i<times; i++){ n = getRandomInt(intMin, intMax); if(n < min){ min = n; } if(max < n){ max = n; } } printf("max = %d\n", max); printf("min = %d\n", min); } |
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max = 7 min = -3 |
yuzunoha, thanks so much for the post.Really thank you! Great.