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1、第一章C语言初步一、选择题1.C2.D3.D4.A5.D6.B7.B8.B9.C10.A二、思考与应用题1.A.字符串常量B.字符串常量C.整型常量D.浮点型常量(double)2.A.longdoubleB.longintC.floatD.字符型常量3.A.整型常量B.字符型常量C.字符串常量D.字符串常量4.FirstExample:10,wisYzis5.125.intmain(void){return0;}6.#includeintmain(void){printf("HelloWorld");return0;}7.#i
2、ncludeintmain(void){printf("Wearetolearncorrect");printf("Clanguagehere");return0;}/*main*/8.#includeintmain(void){/*LocalDefinition*/inta;floatb;charc;/*Statements*/printf("Theendoftheprogram.");return0;}/*main*/9.#includeintmain(void){/*LocalDefin
3、ition*/inta;floatb;charc,d;/*Statements*/printf("Theendoftheprogram.");return0;}/*main*/10.#includeintmain(void){/*LocalDefinition*/inta;charb,c,d;floate,f;/*Statements*/printf("Theendoftheprogram.");return0;}/*main*/11.A.charoption;B.intsum=0;C.floatproduce=1;12.A.s
4、hortcode;B.floatsalesTax=.0825;C.doublesum=0;13.#includeintmain(void){floatcost=172.53;printf("Thesalestotalis:$%6.2f",cost);printf("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^");return0;}14.#includeintmain(void){printf("******");printf("******");printf("******"
5、);printf("******");return0;}15.#includeintmain(void){printf("*");printf("**");printf("***");printf("****");return0;}16.#includeintmain(void){intx1=1;intx2=10;intx3=100;intx4=1000;intx5=10000;printf("%d%d%d%d%d",x1,x2,x3,x4,x5);printf("%f%f%f%f%f
6、n",x1,x2,x3,x4,x5);return0;}17.#includeintmain(void){intx;printf("Pleaseenteraninteger:");scanf("%d",&x);printf("Thenumberasacharacter:%c",x);printf("Thenumberasadecimal:%d",x);printf("Thenumberasafloat:%f",x);return0;}三、编程题1.#includeintmain(void){in
7、tx1;intx2;intx3;printf("Pleaseenterthreenumbers:");scanf("%d%d%d",&x1,&x2,&x3);printf("Yournumbersforword:");printf("%8d%8d%8d",x1,x2,x3);printf("Yournumbersreversed:");printf("%8d%8d%8d",x3,x2,x1);return0;}2.#includeintmain(void){intx1;intx2;intx3;
8、intx4;intx5;intx6;intx7;intx8;intx9;intx10;printf("Pleaseenter10numb