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- #include<stdio.h>
- int is_prime(int m);
- int main(void){
- int i=1, count=0, n, coun, prime;
- FILE * fopen;
- fopen = fout("prime.txt","w");
- fprintf(fout,"Enter a value: %d",n);
- fscanf(fout,"%d",&n);
- fprintf(fout,"count prime");
- i=1;
- count=0;
- while(count<n){
- if(is_prime(i)==1){
- count++;
- fprintf(fout,"5%d 5%d", coun, prime);
- }
- i++;
- }
- fclose(fout);
- return 0;
- }
- int is_prime(int m)
- {
- int k, limit;
- int result;
- if (m == 1) {
- result = 0; /* 1 is not prime */
- } else if (m == 2) {
- result = 1; /* 2 is the only even prime */
- } else if (m % 2 == 0) {
- result = 0; /* even numbers > 2 are not prime */
- } else {
- result = 1; /* start off assuming that m is prime */
- limit = m/2; /* check up to 1/2 of the number */
- for( k = 3; k <= limit; k = k + 2 ){
- if( (m % k) == 0 ){
- result = 0;
- break;
- }
- }
- }
- return result;
- }
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