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prime numbers using functions
//gcc 4.9.3 #include <stdio.h> int testprime(int v) { int i; for(i=2;i<v;i++) { if(v%i==0) return 0; } return 1; } int testdigit(int v,int digit) { while(v) { if(v%10==digit) return 1; v/=10; } return 0; } main() { unsigned int min=300,max=500,digit=1,data; for(data=min;data<=max;data++) { if(testprime(data)&&testdigit(data,digit)) printf("%d ",data); } }
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