3、sum(x,y)floatsum(floatx,floaty);{floatz;z=x+y;return;return(z);}main(){floata,b;intc;floatc;scanf("%f,%f",&a,&b);c=sum(a,b);printf("Sumis%f",sum);printf("Sumis%f",c);}4计算机程序设计基础(c语言)习题程序改错4.编程计算下面分段函数,输入x,输出ymain(){intx,y;printf(“Inputx:”);scanf(“%d”,x)
4、;scanf(“%d”,&x);if(x<0)y=x-1;elseif(x>=0
5、
6、x<=10)elseif(x<=10)y=2x-1;y=2*x-1;elsey=3x-1;y=3*x-1;printf(“y=%d”,&y);printf(“y=%d”,y);}5.求1+2+3+4++100,并输出.main(){inti,sumsum=0;i=1;while(i<=100){sum=sum*i;sum=sum+i ;i++;}printf(“%c”,sum)printf(“%d”,sum) ;}6.求100~300
7、间能被3整除的数的和。main(){intn;longsum;longsum=0;for(n=100;n<=300;n++){if(n%3=0)if(n%3==0)sum=sum*n;sum=sum+n;}printf(“%ld”,sum);}4计算机程序设计基础(c语言)习题程序改错7.求3+4inta=3,b=4;main(){inta,c;intc;c=a+b;printf(“c=%d”);printf(“c=%d”,c);}8.程序读入20个整数,统计非负数个数,并计算非负数之和.#include“stdio
8、.h”main(){inti,a[20],s,count;s=count=1;s=count=0;for(i=1;i<=20;i--)for(i=0;i<20;i--)scanf(“%d”,a[i]);scanf(“%d”,&a[i]);for(i=0;i<20;i++){if(a[i]<0)break;continue;s+=a[i];count++;}printf(“s=%fcount=%f”,s,count);printf(“s=%dcount=%d”,s,count);}9.x,y两个数中,让x中存较
9、大的数,y存较小的数#includemain(){intx,y=200,z=0;x=180;if(x10、);c=5.0/9*(f-32);printf("f=%f,c=%f",c,f);printf("f=%.2f,c=%.2f",f,c);}4计算机程序设计基础(c语言)习题程序改错11.求一个3×3矩阵的主对角线元素之和main(){inta[3][3];intsum;intsum=0;inti,j;printf(“Enterdata:”