| 2_3.c |
| #include <stdio.h> #include <stdlib.h> #include <math.h> main(){ int judge1[10], judge2[10],judge3[10],i=0,j,n; double s1,s2,s3,total1=0,total2=0,total3=0; double sq_dist1=0, sq_dist2=0, sq_dist3=0; double mean1=0, mean2=0, mean3=0; double std_dev1=0, std_dev2=0, std_dev3=0; /* loops until scanf returns End Of File... */ while(scanf("%d%lg%lg%lg",&n,&s1,&s2,&s3)!=EOF){ // place each of scores into appropriate array judge1[i]=s1; judge2[i]=s2; judge3[i++]=s3; } /* Calculate the mean of each judge */ for(j=0; j<i; j++){ // add the totals total1+=judge1[j]; total2+=judge2[j]; total3+=judge3[j]; } // then calculate the averages mean1=total1/i; mean2=total2/i; mean3=total3/i; /* Calculate the SD of each judge */ for(j=0; j<i; j++){ // calculate distance from average sq_dist1+=pow(judge1[j]-mean1,2); sq_dist2+=pow(judge2[j]-mean2,2); sq_dist3+=pow(judge3[j]-mean3,2); } std_dev1=sqrt(sq_dist1/(i-1)); std_dev2=sqrt(sq_dist2/(i-1)); std_dev3=sqrt(sq_dist3/(i-1)); printf("\t\tAverage\tSD\n"); printf("Judge 1 :\t%.1f\t%.1f\n",mean1,std_dev1); printf("Judge 2 :\t%.1f\t%.1f\n",mean2,std_dev2); printf("Judge 3 :\t%.1f\t%.1f\n",mean3,std_dev3); return 0; } |
| James Little |