A. 排序1直接冒泡即可，注意double t#includestdio.hdoublea[1010];intmain(){intn;scanf("%d",n);for(inti=0;in;i++){scanf("%lf",a[i]);}for(inti=0;in-1;i++){for(intj=0;jn-1-i;j++){if(a[j]a[j+1]){doublet=a[j];a[j]=a[j+1];a[j+1]=t;}}}for(inti=0;in;i++){printf("%.2lf ",a[i]);}printf("\n");return0;}B.排序2直接冒泡即可，注意用getchar()吃掉多余的空格和换行#includestdio.hchara[1010];intmain(){intn;scanf("%d",n);getchar();for(inti=0;in;i++){scanf("%c",a[i]);getchar();}for(inti=0;in-1;i++){for(intj=0;jn-1-i;j++){if(a[j]a[j+1]){chart=a[j];a[j]=a[j+1];a[j+1]=t;}}}for(inti=0;in;i++){printf("%c ",a[i]);}printf("\n");return0;}C. 排序3直接冒泡即可，注意以EOFEOFEOF结尾的多组输入#includestdio.hinta[1010];intmain(){intn;while(scanf("%d",n)!=EOF){for(inti=0;in;i++){scanf("%d",a[i]);}for(inti=0;in-1;i++){for(intj=0;jn-1-i;j++){if(a[j]a[j+1]){intt=a[j];a[j]=a[j+1];a[j+1]=t;}}}for(inti=0;in-1;i++){printf("%d ",a[i]);}printf("%d\n",a[n-1]);}return0;}D. 排序4双重forforfor循环遍历每两个数，将ai−aja_i - a_jai​−aj​和aj−aia_j - a_iaj​−ai​加入一个数组中，冒泡即可。#includestdio.hinta[1010],b[10005];intmain(){intn;intm=0;scanf("%d",n);for(inti=0;in;i++){scanf("%d",a[i]);}for(inti=0;in-1;i++){for(intj=i+1;jn;j++){b[m++]=a[i]-a[j];b[m++]=a[j]-a[i];}}for(inti=0;im-1;i++){for(intj=