进程控制实验报告Word文档下载推荐.docx
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- 上传时间:2022-10-05
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进程控制实验报告Word文档下载推荐.docx
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gettimeofday(&
js,NULL);
start=js.tv_usec;
j++)sum[i]+=array[i][j];
}
for (i=0;
i<
allsum=sum[i];
printf("
sum=%f\n"
allsum);
gettimeofday(&
tv,NULL);
end=js.tv_usec;
time=%d\n"
end–start);
return0;
运行结果为:
sum=49951.056669
time=1456
2、求解问题的多道程序设计的程序及运行时间
#include<
sys/types.h>
#include<
doublearray[4][25000];
doublesum[4]={0.0}doubleallsum[4];
doublesum=0.0;
intfpipe[4][2];
structtimevaltv;
time_tstart,end;
a[i][j]=(double)rand()/(double)RAND_MAXgettimeofday(&
tv,NULL);
if(pipe(fpipe[i])<
0)
pipeerror!
\n"
);
exit
(1);
if(fork()==0){
++j)
sum1[i]+=a[i][j];
write(fpipe[i][1],&
sum1[i],sizeof(double));
exit(0);
else
if(!
read(fpipe[i][0],&
sum[i],sizeof(double)))
exit
(1);
sum[%d]=%f\n"
i,sum[i]);
for(i=0;
i<
i++)sum+=sum[i];
sum=%f\n"
sum);
end=js.tv_usec;
time=%d\n"
end-start);
return0;
其结果为:
Sum=49551.056669
Time=5035
其部分生成的数字为:
………..
0.5800
0.0670
0.4490
0.5106
0.6561
0.7088
0.5746
0.7144
0.4324
0.2044
0.0959
0.4480
0.0764
0.3211
0.0312
0.1233
0.3066
0.3779
0.0558
0.5903
0.2981
0.3085
0.6777
0.9622
0.4080
0.2521
0.0996
0.4301
0.5412
0.2261
0.0797
0.1212
0.2931
0.5287
0.6318
0.9492
0.2376
0.2065
0.6636
0.6700
0.4109
0.7596
0.1180
0.4873
0.0807
0.1492
0.6106
0.3873
0.5271
0.6664
0.9776
0.8252
0.9749
0.6553
0.7874
0.3829
0.9075
0.8870
0.8130
0.4486
0.1131
0.8927
0.5698
0.4062
0.4214
0.2017
0.3554
0.6590
0.4081
0.0190
0.3290
0.8190
0.7786
0.4470
0.3063
0.8593
0.5962
0.9169
0.2466
0.5833
0.2242
0.9485
0.5582
0.8796
0.7359
0.9411
0.7870
0.6229
0.7541
0.2357
0.7360
0.6468
0.8055
0.1422
0.0683
0.0072
0.4976
0.7273
0.4153
0.5166
0.0563
0.2343
0.2952
0.5033
0.5407
0.1544
0.0995
0.4576
0.4010
0.2227
0.0409
0.6253
0.1712
0.5991
0.5049
0.9071
0.5402
0.2919
0.5300
0.2943
0.5275
0.2660
0.3330
0.4082
0.0094
0.3402
0.9058
0.7367
0.7555
0.4224
0.7929
0.9898
0.7175
0.2962
0.5305
0.8719
0.3957
0.9881
0.2730
0.6184
0.0289
0.8983
0.7896
0.6280
0.4031
0.6968
0.1682
0.6950
0.2268
0.4625
0.2225
0.4928
0.4036
0.5555
0.9010
0.4130
0.8957
0.8068
0.1496
0.6512
0.2292
0.9426
0.6411
0.9467
0.2388
0.1716
0.8186
0.6345
0.1597
0.0916
0.2529
0.1886
0.9899
0.0425
0.8166
0.3930
0.7393
0.9848
0.0881
0.9661
0.4473
0.3106
0.4589
0.8508
0.8661
0.3599
0.2638
0.7619
0.1668
0.4134
0.4131
0.3959
0.3560
0.0541
0.3426
0.5948
0.2257
0.1613
0.2293
0.3854
0.4822
0.5740
0.2428
0.5247
0.3907
0.6359
0.2639
0.3755
0.7239
0.2300
0.8227
0.0345
0.6889
0.6736
0.9006
0.0488
0.9374
0.6625
0.2156
0.3508
0.0755
0.6115
0.7068
0.1297
0.9541
0.3017
0.1154
0.5309
0.7408
0.3683
0.0131
0.3148
0.6111
0.5378
0.7055
0.2470
0.8017
0.0810
0.9709
0.0317
0.9037
0.0053
0.7206
0.5773
0.9060
0.7694
0.5147
0.5684
0.9850
0.8655
0.6440
0.5966
0.5724
0.7736
0.5507
0.8740
0.1291
0.6661
0.4050
0.8699
0.0344
0.4181
0.1847
0.6455
0.9558
0.8902
0.8924
0.7575
0.9712
0.8633
0.7892
0.8749
0.8686
0.5098
0.4523
0.7746
0.2792
0.9670
0.3430
0.2643
0.8325
0.9870
0.8608
0.4048
0.7606
0.4115
0.2789
0.8897
0.0776
0.6838
0.7595
0.1120
0.1019
0.9443
0.0577
0.8345
0.6499
0.8152
0.8057
0.5132
0.6044
0.6806
0.3818
0.1142
0.1329
0.1564
0.3935
0.0998
0.4995
0.6578
0.9323
0.4864
0.5186
0.3372
0.2471
0.9301
0.6160
0.1367
0.0077
0.2999
0.8963
0.1197
0.4018
0.8406
0.8772
0.4595
0.6750
0.2747
0.4807
0.0403
0.8791
0.1614
0.4222
0.9933
0.2942
0.5786
0.3868
0.3941
0.0781
0.0446
0.3264
0.5645
0.5632
0.6635
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