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水题一道。两个数,各位数字求和,再相乘。 0MS AC123*45 = 1*4 + 1*5 + 2*4 + 2*5 + 3*4 + 3*5 = (1+2+3)*4 + (1+2+3)*5 = (1+2+3)*(4+5) 囧。。。。 #include <stdio.h> #include <string.h> int main() { char a[15],b[15]; int la,lb,i,sum; scanf("%s %s",a,b); la=strlen(a);a[0]-='0'; lb=strlen(b);b[0]-='0'; for(i=1;i<la;i++) a[0]+=a[i]-'0'; for(i=1;i<lb;i++) b[0]+=b[i]-'0'; sum=a[0]*b[0]; printf("%d",sum); return 0; } Followed by:
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