用C语言实现累加求和各种源程序.doc

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1、C语言累加求和源程序参考：1.用for语句实现：#includeIntmain(void){intsum=0,i,n;printf(“PieaseInputanumbern:”);scanf(“n=d”,&n);for(i=0;i<=n;i++){sum+=I;}printf(“sum=%d”,sum);return0;}2.用while语句实现：#includeintmain(void){intsum=0,i=0,n;printf(“PieaseInputanumbern:”);scanf(“n=d”,

2、&n);while(i<=n){sum+=I;i++;}printf(“sum=%d”,sum);return0;}3.用do-while语句实现：#includeintmain(void){intsum=0,i=0,n;printf(“PieaseInputanumbern:”);scanf(“n=d”,&n);do{sum+=I;i++;}while(i<=n);printf(“sum=%d”,sum);return0;}