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- #include <stdlib.h>
- #include <stdio.h>
- char * isPrime(int i){
- int c, flag;
- for(c = 2; c <= i/2; i++)
- {
- if((i % c) == 0){
- flag = 1;
- break;
- }
- }
- if(flag == 0)
- return "yes";
- else
- return "no";
- }
- int main(int argc, char **argv){
- if(argc < 2){
- printf("error\n");
- exit(0);
- }
- int input = atoi(argv[1]);
- printf("%s\n", isPrime(input));
- return 1;
- }
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